Glasses are a total racket. Purchasing your glasses online is many, many times cheaper than going to Lenscrafters or basically any other brick & mortar store in the US. I've been buying online for years and they're every bit as good as usual ones. You do need your pupillary distance, but you either measure this yourself with the help of a friend, or ask your optometrist. If they refuse or tell you how evil buying glasses online is, get a new optometrist.
That's brick-and-mortar: personal service, ready in 30 minutes. Around 8000 yen, frames and lenses. (Not the thinnest lens, no special coating, but very good.)
> You do need your pupillary distance, but you either measure this yourself with the help of a friend
I have a fool-proof way to do this yourself.
Use a mirror and a ruler. Place the ruler on the mirror and stare with your left eye into that same eye's mirror image, such that the ruler's 0 tick is centered on the pupil. Then, open your right eye and close the left. Stare into your right eye across the ruler and note the millimeters. Flip back to the left eye to make sure you haven't moved from zero.
This is dead accurate. Staring into your own eye in the mirror means you have a perpendicular line from either eye to the ruler.
> I have a fool-proof way to do this yourself.
Use a mirror and a ruler. Place the ruler on the mirror and stare with your left eye into that same eye's mirror image, such that the ruler's 0 tick is centered on the pupil. Then, open your right eye and close the left. Stare into your right eye across the ruler and note the millimeters. Flip back to the left eye to make sure you haven't moved from zero.
Damn, that's really clever. How did you come up with that?
It's easy to come up with in the course of experimenting to measure your own inter-pupillary distance.
It goes without saying you will need to look at yourself in a mirror, with a ruler somehow. From the parallax problem is obvious, as is the fact that it's only a problem for mismatched eyes.
I order my glasses from Zenni, but I don't think it's for everyone. For one thing, they always locate the pupil at the exact midpoint of the lens. Unless you wear very small frames, your pupils are probably located somewhat higher in the lens when you are wearing the glasses in the most comfortable or attractive manner. This can result in double vision, chromatic anomalies, headaches, and worse. It's far more likely to be an issue if you have a strong prescription than a weak one, but inexpensive glasses may be a false economy if you have any of these problems.
edit: Also, one pair of glasses I ordered from Zenni gave me a rash around my eyes and on my eyelids. I've gotten contact rashes from watches before, so it wasn't entirely unexpected, but I'd never had it happen with glasses before. I thought I had just gotten a sunburn at first, and it took me a while to convince myself it was my glasses. (I basically didn't wear the glasses for a month, and then wore them again.) It's either the plastic used for the frame, or maybe a mold release. Regardless, I've tried washing the glasses with a strong detergent, and I've had them ultrasonically cleaned and they still give me a rash. They cost $30 though, which basically makes them disposable compared to normal glasses.
Sort of off topic, but the contact rash sounds familiar to me. It may be 'nickel allergy', it runs in my family. Any watches, bracelets, glasses, belts with nickel in them touching skin for a while seems to cause it.
> This can result in double vision, chromatic anomalies, headaches, and worse.
I can attest to this. My astigmatism is pretty severe, and the lenses are useless if any measurements are even slightly incorrect.
Usually when I get new lenses I end up sending them back at least once for one defect or another. Sometimes this is the frame tech's fault, but I've also seen quality issues from the lens factory.
Pupillary distance is basically the horizontal location of the pupils. The issue is that pupils can also have a vertical offset from the center of the lens as well. Accounting for PD alone is sufficient for some people. I'm not a doctor, so I'm not qualified to recommend one option over another. It is something you may want to ask your own doctor about though.
To be fair to Zenni, most online eyeglass sites don't request vertical measurements as the PD is sufficient for the majority of single vision users and there isn't a single vertical measurement that can be applied from one user to other glasses. Ocular center height is very subjective & measured during the fitment of that frame to the user.
Optical center being the same height as geometric center is a safe choice for something only made to measure.
There are sites that take segment height for bifocals, but the intended frames need to be in hand for the user to measure.
I've bought stuff from all 3 before.
Zenni is the one that I finally figured out how to order for my PD correctly, but there are some caveats.
1) See this twitter https://twitter.com/troyd/status/560089054356574209 - My zenni specific email was spammed. They either sold my email or they were hacked. I don't know what the cause, but I would not give them anything valuable including only using PayPal with them.
2) Their anti-reflective coating is not as good what I get from local optometry. My pictures tend to have this greenish tint, and I paid for the best thing you can get from them.
That said, I was able to get $8 glasses that worked and I can see perfectly using them. If I need cheap glasses, I know where to go.
Luxottica is the main reason glasses are a total racket. They own every major brand, store, and even insurance companies that provide Vision coverage. There are very few companies that have such a monopoly. They will refuse to sell your brand and have done this to Ray ban, Oakley and then buying both brands when they were in bankruptcy or on the verge. Not even Walmart or Costco can undermine them.
If you're ever in Europe that is when to buy frames. They are substantially cheaper than in the US/Canada. I bought a pair of Armani Frames for 1/5 the price I could in the US.
My close friend tried Zenni. They sent her glasses which gave her fishbowl vision every time she rotated her head (edges warped quickly as the head turned). She contacted Zenni support and was told "We found a defect in your lenses and we'll send you corrected ones".
The same thing happened with the second pair. So she contacted them and got the same "We found a defect" and they sent her a third pair.
Same thing happened with the third pair. When they told her the same thing ("We found a defect") and offered to send her a fourth pair, she declined and got her refund.
I have nothing against online vs optometrist, but I do know of folks who have not had good luck online.
Just to chime in this is my experience right now and it degrades my quality of life. It looks fine if you are focusing in the center but anything to offset you can't see, it's blurry and it causes considerable eyestrain. I was happy to pay $70 instead of $400 for a pair of glasses, but I need to find a real optometrist and just pay up. I have terrible vision, -7 contact lens RX (ish). And astigmatism. These glasses are probably fine for people who need less correction.
Yeah and -7 this is probably something worth spending a bit more money on. I am at -8.5 and starting at -8 the government actually pays back more money and covered the complete cost of my glasses and my lenses up to a certain point as well. (a total cost of about 400 euro).
I really dislike wearing glasses and much prefer my lenses, yet when I come home I often just wear them anyway. Personally, it is something I did never mind spending some more money on as it is something I need to function properly (lenses or glasses)
Warby Parker (https://www.warbyparker.com/) makes some really nice "luxury" glasses, even though they still cost less than the cheapest pair you'll see in a typical store. They'll even send you 5 frames to try on at your home.
warby parker frames look trendy but they're pretty low quality cheap plastic frames, and they're dramatically overpriced compared to comparable glasses from zenni or similar
I have tried both Zenni and Warby. Warby's frames are much higher quality than Zenni. I'm on my 3rd pair of regulars, and 2nd pair of sunglasses (which are metal, by the way, and very strong), over the course of 4 years. I still have all pairs I ordered, and they are all still fine.
They are not "cheap plastic frames" by any stretch. I'd put them up against the Luxxotica frames any day. They use the high-end plastics, with metal-reinforced stems. The Zenni's I tried, on the other hand, have no reinforcement, and the plastic is definitely more brittle.
Anecdata, but my SO and I both have had frames from them for about a year with no issues, and my mom's had hers for about 6 months and had to bend them quite a bit to fit her and they've been just fine.
If you want a specific frame for some reason, it's a good value. I bought a pair of Oakleys from glasses.com ( a luxottica online outlet) for a savings of about $50 from retail. I think the high index lenses were cheaper too. But if you buy $8 glasses, they are going to be junk.
AFAIK almost all the glasses frames are worth few dollars. What you pay for branded ones is marketing and bit of design, not generally the material quality.
i can't say that they are all categorically low quality, but you're obviously not getting premium frames for very low prices. imo it's worth dishing for a pair of spares at the least, though -- but probably not at warby parker prices
Thanks for this. I've looked at all the others and was generally disappointed in the selection. So far I'm impressed by what I'm seeing at warbyparker.
I've had satisfactory results from all three of these. One of our salespeople was rather upset that my titanium memory-wire glasses looked about the same as his but cost an order of magnitude less.
Try eyebuydirect.ca, I've tried zenni, loved them until I found eyebuydirect. (Wow that really sounded like a commercial LOL) in all seriousness, great style, cheap prices, lots of sales.
I would love to buy glasses on-line, but have a simple issue of having an absolute massive head. Unless I go in and physically try on a pair, I just have to assume it won't fit (usually the width of face, but temple length is also a pain...)
I have a really wide head, but a relatively narrow face. I have a lot of problems with fit as well as style as a result. I just went to Costco and tried on every pair of glasses they had, figured out what style looked best, took the measurements off the frames that fit, and used that to order glasses online. Costco's profit comes from their membership fees rather than selling anything, so you don't have to feel bad about not buying anything (since you already have a membership).
The one thing I need to look out for is how the hook on the arm is constructed. One of my ears is slightly farther back than the other (by maybe 2 millimeters). If I buy frames where the arm can't be readjusted the glasses can rest a bit askance on my face.
> Costco's profit comes from their membership fees rather than selling anything
Membership is key both because its essentially zero cost, and because paid membership motivates choosing Costco as the place to make purchases (one reason Costco sells so,much more per unit of floospace than, e.g., WalMart), but Costco, absolutely, does make profits from sales, even if its margins are fairly low.
Well, their stated goal is to only make as much profit as is needed to cover their expenses. I personally don't consider that profit, but the price they sell goods for is indeed greater than the cost they bought them for.
I also have a wide face. I used Warby Parker's home try-on and ended up finding a pair I liked that was 145mm in width. A lot of their "wide" frames didn't fit me either, and the one I chose was probably one of four or five in total they offered that fit.
The zenni website shows the frame width (and other dimensions) in millimeters for each pair of glasses. I've ordered over a dozen of pairs over the last 3 years and the measurements are accurate.
Measure the width of your current pair that you like. You're may be 150mm+ in width and zenni has sizes even bigger than that.
I agree that mid-lower-range shops are a racket: however, don't discount the luxury and privilege of high-end options of dedicated professionals. My glasses cost in total almost $1000. I wear them almost every waking moment, they are exceptional designer hand-made frames from France with Zeiss lenses and Japanese transition technology, and the optometrist is top-of-the-line who also does an eye cancer check each year. They are a beautiful piece of art that I chose, because I find contact lenses troublesome and I enjoy taking my glasses off to both relax and for the pleasure of having a blurred world around me (other short-sighted users will understand this pleasure). When I was a student, I wore $25 government-sponsored glasses. I'm so pleased there are options for both. I'm so glad there are $1 glasses for those who need them and can avoid overpaying for low quality.
By the way, "short-sighted" in American English universally means "lacking in imagination or foresight". Not that you're obliged to accommodate American English, of course, but "nearsighted" is the equivalent.
Right, that's the point: the chain stores don't have doctors, they have people who are trained to use machines and don't check for anything except getting your prescription.
I had overall good experience with Zenni. One downside is that their rimless frames are not particularly sturdy; but then, for the price that I pay for them, it's still cheaper to just order a new frame.
I didn't have any problems with tint, fishbowl, or other optical abberations. This is with -4 correction on both eyes.
I tried Zenni Optical's oleophobic coating (finger-print resistance) and didn't notice any improvement when compared to a lense without any coatings... but besides that, I am happy with their glasses so far.
Seriously though I used a site like this to find out my IPD for playing VR and it came out slightly different each time, though always in the same ballpark.
I also do this. I used optical4less and highly recommend it. I got high quality mineral glass lenses and they were great. Can't go back to polycarbonate after those.
Unless you're completely price sensitive or completely brand or specific style dedicated, I think this is totally wrong.
I tried a number of different companies online during off years (I have insurance that pays for glasses every two years). Warby Parker, Zenni, glasses.com and a few others.
Warby Parker glasses were junk. With the exception of glasses.com, adjustments required paying or scamming someone into adjusting them for me. The money savings were minimal compared to retail if you shop around at all.
This time I went to an actual optometrist and bought glasses through them. The cost was competitive and the process completely hassle free.
>If they refuse or tell you how evil buying glasses online is, get a new optometrist.
It's truly hilarious how defensive they get over online glasses purchases. I've been using Zenni for over 5 years now, and there's no way in hell I'd go back to using a local optometrist for my glasses.
My glasses cost $39 from one of the many online cheap glasses makers. So now I have more money to donate to the $1 glasses campaign :)
Last time I got glasses, I tried a test, I bought the $300 glasses from my eye doctor ("only" $200 after insurance), and I bought a pair of $39 glasses online. I found no difference between the two other than price (and the ones I bought online arrived by mail the day before the expensive pair was ready from my eye doctor).
And I bought a second pair of backup glasses for less than my eye doctor wanted for his "lens protection insurance".
Though admittedly, I have a simple, low-power prescription (< -3.0, no astigmatism), so your milage might vary with a more complex prescription.
Last time I got a new prescription I asked them to include the PD number and they refused. They would only give that to me if I bought glasses through them. I couldn't even pay them for just the measurement (I suggested $10-$20).
It's easy enough to measure myself, so that's what I did.
My glasses were $45 and he said his costs were more than twice that. Where's all that money going?
> Last time I got a new prescription I asked them to include the PD number and they refused. They would only give that to me if I bought glasses through them. I couldn't even pay them for just the measurement (I suggested $10-$20).
Go to Walmart. Most have an optometrist on site (can check online) and you can take the prescription elsewhere to buy glasses online. Probably cheaper (for the "doctor" portion) than anywhere else around as well.
If you're in the U.S. and this happens you can and should file a HIPAA complaint. Vision care providers are bound by HIPAA just like other medical providers and with few exceptions they are required to give you a copy of your protected health information (PHI) upon request, which includes your PD. The provider may require you to make the request in writing and may charge you a reasonable fee for e.g. the time it takes a worker to send you the information, and may take up to 30 days to fulfill the request. HHS.gov has a great factsheet and FAQ here: http://www.hhs.gov/hipaa/for-professionals/privacy/guidance/...
In comments to the FTC the National Association of Optometrists and Opticians said it "agrees that patients and eyeglass consumers have the right to a copy of medical records, which will include the pupillary distance if that measurement has been taken by either the prescriber or the dispenser" (emphasis theirs) but takes no position on whether or not the measurement should be required. https://www.ftc.gov/system/files/documents/public_comments/2... (pp.12)
I presume you'll be finding a new optometrist for next time. I would have refused to pay, since they weren't giving the full service. In Australia the eye test is covered by Medicare, so if they refused to supply it you could complain to the government insurer and there would be trouble.
According to my optometrist, the PD measurement isn't part of the prescription. The prescription documents the lens, the PD is needed only for glasses.
Do you have any recommendations about this? It's the kind of thing I'm a bit nervous about searching as I can see many, many ways I might accidentally read the optician equivalent of an anti-vaccination blog.
They sent me a free PD ruler (it has a slit in the middle so you can see your pupils and a notch in the middle to center it on your nose) with my glasses, but I just used a standard ruler the first time I measured, and got the same measurement when my glasses arrived and I used their ruler. I was off by 1 mm in one eye when I compared to my eye doctor's measurements. For my prescription, that's not very significant, but it might be for a stronger prescription.
You can buy a PD ruler for a dollar or two from eBay if you don't want to use a standard ruler.
Online glasses still come out to about $80 for me based on the requirements of my prescription, but yes, the markup that optical places charge is through the roof. Outlets like Zenni Optical are seriously giving local optometrists a run for their money, to the point where the industry is panicked over it.
"The industry" is mainly Luxottica[1], a company that controls the majority of the world glasses market - prescription and non, production and retail, and even (through a vision insurer) purchasing. There's a ton of "look at this horrible monopoly and how many damage they do!" type articles about.
This is fantastic, and I will definitely be making a donation, but I think they would benefit from taking a page out of the Lucky Iron Fish book, and sending a pair of the glasses to donors who contribute 50 dollars or more. I have found the Lucky Iron Fish I have to be helpful in convincing others to donate, and I think having a pair of these glasses could similarly make the project more tangible to prospective donors.
Why aren't these kind of hardware driven campaign fully open source?
Why is there not a pdf with plans and clear cut instructions on how to build the wire bender (which at 2500 Euros is absolutely insane)?
I understand using the money for funding more glasses makes sense, but in reality if your mission is for this hardware breakthrough to improve everyone's life all around the world, why hide and hog the design?
I'd like to build this in my machine shop in the other corner of the world, why send 2500 Euros to Germany? I just don't get it. It makes me think of ulterior motives and when that happens I quickly lose faith in the organization. Everyone loses, the cause itself being the most affected.
Very nice! I only wish your web site had og metadata so that I could socially share your site on FB, LinkedIn, etc. and have the title, description, and preview image show up in my posts.
How do they do cylindrical axis with a small inventory of lenses and non-round lenses? The three parameters for lenses are spherical radius, cylindrical radius, and axis of the cylinder. A complete set of a good range in all three is large, which is what leads to custom lenses.
There's a known way to cut costs with round lenses. With round lenses, you can have a small inventory of premade lenses with only two parameters. The axis is set with a little notcher that makes a notch which locks it to a bump in the frame, so it can't rotate. These have been used in India for decades. There's an optical store in an attache case.
If the One Dollar Glasses guys only use 25 different lenses, are they just blowing off the cylindrical correction entirely? Are these just "readers" like the ones available cheaply at most drugstores? Those you can get on Alibaba for $0.75 each in bulk.[1]
That is the impression that I got - they are just like off-the-shelf reading glasses. But so what? They are giving cheap glasses to people in poverty who had nothing before. Sure, you can buy similar thing in bulk for similar prices, but can you then also deliver them to these people for the other quarter? Even if you can do so, are you actually doing so? These guys are. I'm not going to criticize them for it.
It's pretty amazing how much extra cost most glasses cost. And this comes at a very steep cost for most people. I've worked with a charity organization called Remote Area Medical (RAM) which provides free medical, dental, and vision care. Lots of people are there because they can no longer see, cannot get a job because of it, and thus have no money. RAM can create a vision prescription, prepare the lenses on the spot, and give a patient glasses for a cost of $15 in an hour, patients dont pay anything. We really need to do more in making cheap glasses more available to people in the US.
I got 4 pairs of glasses on amazon (needed the opposite of reading glasses which are hard to find in stores) for $8. I was pretty darn impressed by how cheap the free market is vs doctors offices.
Having worked in the optical business to put myself through engineering school, I know that glasses can be very expensive; there's a poop tonne of overhead at those places.
That being said, be very careful of cheap glasses. If you have a strong Rx, you need the OC to be aligned properly with your P.D. otherwise you're inducing prism. This can cause severe headaches and eye fatigue. You should also make sure you go see a Dr regularly; those exams test more than just your vision. You could be going blind in a preventable way and not know until too late.
Oh, cheap frames just aren't as comfortable at the end of the day as not as cheap frames. Buyer beware.
* Not a Dr myself. I worked in the labs. Don't take anything I say to be any sort of medical advice. I'm merely saying be very careful with your precious eye sight.
I think it's great that places like Zenni are undercutting optometrists' prices. But as soon as I read "Amazon" the first thing I thought of was knockoff products from China and how harmful those could be to ophthalmology. It's one thing to get a phony "1 TB" USB stick, its another to get two pieces of clear polycarbonate labelled "-3.25, 0.5" that could actually harm your eyes by looking through it.
This is obviously a really admirable cause, and as someone who wears contacts, I couldn't imagine not having access to corrective lenses.
Just a word of caution to anyone considering making a donation, their donations page is not served over HTTPS. Their unsecured page renders an iframe [1] from their payment processor that is served over HTTPS though. I haven't tested it, but you should be able to make a donation securely via that link.
I reached out to them to let them know and offered some assistance.
I am using prescribed glasses since I was in 3rd grade. I feel like I'm wasting money when I spend more than 1000 INR (around 15 USD) on glasses. I can't imagine spending 700 USD on glasses. I can live on that money for about 4 months with that money.
It's a bit (actually a lot) worrying that their donation page that you enter personal and credit card info is not over HTTPS. Possibly it will significantly decrease the donations they'll receive online.
The comments are very interesting. I think glasses are a very specific issue. The question is: do want perfect view or just want to see something better.
For better view this is great.
But for the developed world it is not comparable. Either because the eyeglass frame should follow some trend, or the glasses itself needs some additional threatment.
For example, my glasses are 'cheap' even as I need special glasses. Yes, the diopter are different between left and right. But much more important is the parallax compensation for me. My optician exchanges the glasses even for free, if they don't fit. So online, is realy not an option.
Buying glasses in Asia or online is so much cheaper than the scam run by Lenscrafters, most optometrists in the US. Its sold as a designer product where you spend $$$ on frames, the glass material with fancy treatments, and they charge you maybe 5-10x the actual costs.
I have ordered from Goggles4u, Zenni etc and these places must have razor thin profit margins, they always have coupons and its dirt cheap, never had issues with the quality of the lenses. You can always go to any optometrist/Costco etc and get the lens checked out to confirm.
I have found purchasing glasses can be hit or miss weather I buy $600 glasses or less that twenty dollar glasses. I may miss a bit more with cheap glasses, but I can take a lot more shots.
I've used zennioptical.com and it has worked really well. I've run into frames that do not fit, but they were cheap mistakes and once I found something I liked, I just reorder every few years.
Paying attention to the frame measurements is pretty important if you buy online.
I will definitely be donating. I've had glasses since I was 3 and I understand how expensive they can be. (as a kid, I used to break mine often and my parents would have to pay insane amounts of money to get new ones).
From what I understand, the frames themselves are just overpriced[0]
i bought a dozen negative glasses for $15 five years ago at chinatown in Jakarta, Indonesia; should be cheaper in china.
same model, same power, but can't choose color.
the retail is available so i can
choose model, power, color, etc for $2 per glasses
I also bought a +4 glasses for less than $1, metal frame. positive glasses are cheaper maybe because there's less demand.
their quality depend solely on material, not price. my more stylish glasses (no-frame-around-glass, flexible handle) lasts about 3-6 months on heavy use. sturdier styles (harry-potter-styele, thicker plastic frame) lasted more than a year till my-then-baby-boy tore it forcefully from my face. my <$1 positive metal frame glasses seem to last forever.
nb: i wear positive lens everyday for my eye training and choose to no longer wear negative lens; therefore, i haven't bought any lenses for about three years; however, the prices are still about the same last time i checked at jakarta's chinatown.
I've heard that all these different brands in eye glasses industry are mostly owned by just a few holding companies. Hence the high price for everything related to eye glasses.
Never bothered to actually check but I remember hearing that in a podcast.
The site makes it look like exclusively a charity? I can donate and that means someone gets glasses. But can I buy them for myself or a friend as well? I couldn't find the answer (on mobile)
Based on this page[1], it looks like they provide the machine and training required to produce the glasses on-site in remote locations by locals so that they can operate their own businesses. This makes a lot of sense, because it's a lot cheaper to deploy X quantity of materials required to produce the glasses all at once vs hundreds of individual glasses. Also, it helps boost their local economies.
If they really want this to go wide spread, they should make a way for locals to "make money" on the machines, like they can resell them for $2
then it could spread and be self-sustaining, and everywhere would have $2 glasses, which is actually somewhat affordable, even in developing countries.
My only other concern is what about astigmatism? Are they teaching the people that distribute it to accomodate for that (like "2 hour optometrist training" LOL)
The frames are being made from cheap materials (plain wire) closer-to or at the location of the recipients. Another HNer mentioned the person behind this invented a small wire bending device, and that's being used here to form the frames.
I would wager, as well, that the lenses don't have all the fancy coatings and such that you might get from an Optometrist (anti-scratch/fog/glare/shatter, etc)... although when your options are cheap glasses vs. no glasses, most people will opt for having glasses.
It's a bit disingenuous to compare these $1 wire glasses to glasses you would buy from an Optometrist.
There are some very clear and distinct differences.
Yes, there is a lot of bloat in prescription glasses pricing, but it's not 99% bloat (ie. it's not a $1 cost-to-manufacturer product being sold to you).
Frames are overly expensive, but a trivial comparison will reveal most frames are a lot more sturdy/well-constructed than a simple 18awg wire bent into shape.
The real expense is the lenses, and their coatings. The lenses in the $1 glasses surely cannot have anti-glare/fog/scratch/shatter coatings, otherwise the lenses alone would cost far more than $1! Also, the quality of manufacturing plays an important role, as other HNers have pointed out (the precision shape of the lenses, etc.).
The real "meat" of this thing isn't to highlight how over-priced prescription glasses are, it's to showcase a well intentioned charity that's providing clear vision to people who would not be able to get it any other way. These people will accept less quality, because the alternative is not being able to see. The $1 donation price-point enables a wider range of folks to be able to donate, which feeds the cycle.
The pictures show what look like some very flimsy wire frames. I saw the picture of the 8 year old boy wearing those and thought "good thing they're cheap, because they'll be broken in a week."
I kind of wish there was a $2 glasses charity that used solid (if ugly) plastic frames that will stand up to some abuse. Even if the kids value the glasses (they will), it's easy to forget they are on your face when you trip and fall or take a soccer ball to the head or any number of possible calamities.
The best sites I'm aware of are:
http://www.zennioptical.com/ (what I use)
https://www.goggles4u.com/
https://www.39dollarglasses.com/