EEVblog 1554 - Optometrist AutoRefractor Keratometer TEARDOWN!

[@johnmartin1024]

Hi Dave. I would totally love it if you could arrange that tour of the Optometrist's Office with all of the fancy high-tech optical equipment! John M.

[@slappythesquirrel2371]

love to have a tech geek optometrist explain it

[@TomLeg]

THat's what _I_ was gonna say! "-)

[@adharshk903]

exactly, i was also here to comment that.

[@blaisep112]

Just stopped the video to comment this. Now back to the show. :D

[@tomsixsix]

agreed! would be cool!

[@garywiens8625]

I was thinking that I would love to see an optical engineer figure it out and explain what's going on in here, but then I remembered that I work with 3-4 optical engineers. Unfortunately I don't think any of the ones I work with would be able to reverse engineer it based on what the video shows as our specialty is lasers

[@sampofilms]

I lost use of my left eye after an accident while traveling in Japan in 2022 and they used this exact machine to scan my eye at the hospital! Interesting to see it in use/torn apart while not hopped up on those lovely Japanese painkillers. 👍

[@sampofilms]

Also: I vote for a destructive teardown! But only because I want to buy the top level half mirror box assembly off you Dave for a project I am working on. 😆

[@adamsiwek7995]

"Trust me I'm a professional", 1 sec later "I don't know what I'm doing" - pure gold.

[@KeritechElectronics]

You turned it on before taking it apart! I'd love to see the optometrist tour, preferably with teardowns :D Interesting mechanical construction and definitely nice optics. Wonder what @IMSAIGuy and @mikeselectricstuff could say about it. And those colorful twisted wires, and anti-tamper enamel on screws... nice!

[@rahulkushwaha9500]

I would love to see a reaction video from IMSAIguy on this video.

[@TheTallGirl]

Teardown of an optometrist? Poor guy, but can be interesting.

[@zebo-the-fat]

@@TheTallGirl and messy!

[@KeritechElectronics]

@@TheTallGirl ha! With Dave's Dundee knife.

[@Lucien86]

Its not anti-tamper, its just there to lock in the calibration.. That's why Dave didn't want to go in further..

[@robine5280]

As curious as I am about what's in those boxes, I am glad this wasn't a destructive teardown of this working machine. 👍🏼

[@MarianKeller]

To get an initial idea of how old the device is, the WEEE trashcan symbol on the label with the black bar indicates that it was made in or after 2005.

[@pilotsmoe]

I seen some '06 date codes...

[@sudazima]

the measurement you did told you the cylinder astigmatism for your eyes, +1.00 right +0.75 left. not unusual for someone thats getting older. cylinder means if you stare at a streetlight at night it doesnt look like a point but it becomes a line at an angle. this is different from near sighted-ness where it essentially becomes gaussian blurry.

[@quetzalcoatl-pl]

yeah, and I wouldn't be surprised probably that last column (I think it was labbelled AX) were the cylinders axis angle

[@gr4eme1975]

I love seeing the optometry teardowns, I suffer with bi lateral Pellucid marginal degeneration and have had my eyes scanned with so many pieces of kit I've lost count. The modern version of the machine at least here in the UK tends to show a hot air ballon on a desert road I guess some designer thought that would be a good image to focus upon. if you can come across an orb scan at the auctions I would love to see the internals on one of those. its used for measuring corneal thickness and produces a topographic map of the cornea.

[@moyrml]

I was always intrigued by these machines as a kid. I kept wondering what good does it do for the exam when I stare at an image of a stop sign up a hill or a hot air balloon in the sky. Thanks! I would love to see you tear that thing apart AND a talk with you optometrist about it!

[@ray73864]

Watching this was awesome, it also led me to find someone other than Laubman & Pank this time around. Have been using L&P for the last 5yrs since I went for my first eye test, but I felt the old fashioned chair with the manual method of putting lenses in front just didn't work all that well. Made an appointment for my local Specsavers last week which was this morning, put me through this machine and another one (that did a focus and pressure test), and found that the glasses I have weren't sufficient. If it wasn't for this video, I would have just kept going to L&P. Bonus is that my local shopping centre has L&P, Specsavers, and OPSM, 25min drive away here in the South-West of WA.

[@madelinemckinley]

An optometrist tour would be amazing!

[@randalljohnson2]

Eye guy here, most have some minor auto-aligning and focusing which is probably what a good bit if the fiddly bits inside are. The joystick up/down movement is more accurate than the chin rest. So the chin rest isn't moved much unless someone has a watermelon for a head or you are testing a child.

[@MarianKeller]

+1 for the optemetrist tour.

[@andreaaverardi6337]

I repaired many of this equipments in the years of many productors,like Nidek,Canon,Kowa,shin Nippon. Very interesting and complicated machines

[@UnbornApple]

I love all of the stickers labeling ground.

[@norcal715]

I am all for the tour of your eye doc and his current equipment.

[@PelDaddy]

Love love a more in depth tear-down, perhaps in tandem with an expert in this particular field. Thanks for sharing.

[@arthurskudra50]

Definitely get a tour from a local office. I would love if you could get an in depth look at a visual field tester. It's about the closest piece of equipment in an optometrist's office to a video game, complete with button controller remote and moving light!! I have to get tested annually on this machine!

[@natecontarino1748]

"That's not a Auto Refractor Keratometer, THIS is a Auto Refractor Keratometer!" -Capacitor Dundee

[@RetroJack]

There are outfits like the Fred Hollows Foundation that provide help for sight-impaired people in third-world countries and even some Pacific islands that would hugely appreciate a donation of kit like this, even though it's outdated. Have you considered contacting an outfit like that?

[@danpatterson8009]

The best papers I ever read on keratometry and other methods of corneal topography were written by Barry A.J. Clark in the 1970s. He figured it all out.

[@CleoKawisha-sy5xt]

ya great read, really heart pounding stuff

[@DIYPhil]

Will be waiting for the trip to the optometrist

[@YouveBeenCabadged]

Yes please for optometry tour :)

[@hassiaschbi]

Please do a tour of your Optometrist!

[@Manan720]

Would love the tour at optometrist

[@gregorpabst7423]

In the bigger box there could be some picture you project into the eye to focus, e.g. a small boat. Than you can test your sight for far away and closer objects

[@p_mouse8676]

I love the idea of let a optometrist explain. Although having studied this stuff many many years ago, I really doubt they would allow it. but hey, who knows. Even without fancy equipment it's not hard to measure your own prescription with just some super basic tools. (That is slightly different when you have special needs for your eyes) We used to do these experiments a lot back than as practice. They make it seem a lot more fancy than it really is. That having said, very interesting piece of equipment, a lot of smart engineering went in there!

[@danbrit9848]

id love to see a tour and lingo field trip ...always wounderd how they do there stuff

[@jusaca01]

Fascinating! Would love to see more optometrist technology related videos, maybe even going a bit more in-depth ;)

[@campbellmorrison8540]

I have stripped a couple of similar optometry items, seems incredible that they are just being dumped as they were all in pristine condition, I guess the new systems negate these, probably combine functions of multiple machines. Unfortunately I didnt find much to actually salvage but it was quite nice to pull to bits and work out the basics of what was going on inside, these must have cost serious money

[@EEVblog]

I did pay $50 or something for it at auction

[@quartzofcourse]

​@@EEVblogwow that is much cheaper than I expected, guess I'll be looking for one so I can do my whole family's eye checks for less than the cost of one optometrist visit!

[@Cragsymbian]

Please do a complete tear down. Would love to see what's inside those cases.

[@ralphj4012]

Great explanation. Disappointed though that you didn't demonstrate the included twin joystick and buttons full retro games functionality (13:25 along with 19:45), ho, ho.

[@qzorn4440]

Wow, something worth knowing about. 🤸‍♂ Now for some Keratometer videos. 😎 Thanks for the info.

[@ErikN1]

Would absolutely enjoy a tour of the optometrists office

[@SwordQuake2]

6:00 yup, please do that.

[@billmyke746]

I vote to have the tour please.

[@Circuitspecialists]

Wow! I remember going to the eye doctor and this was so high-tech at the time!

[@myaccount8864]

I repaired a few old auto refractometers , usualy with smd electrolytics capacitors failed. They give differerent picture on screen problems. But to calibrate all that lenses is a nightmare.

[@cormoran2303]

oooh this is the sort of thing my optometrist uses to map the progress of my keratoconus.

[@JenkinsUSA]

Thank you Dave for this information video. I’ve learned in my gotta get this device journeys to keep the kit as is and explore the design and resurrect rather than dissemble for parts. Even though its older there is a lot of engineering and design that deserves respect and inspection. If it was trashed it would be a different story. Kiddos on that concept. Keep the videos coming, much respect ✊

[@danbrit9848]

the other boxes id bet is a laser range finder of sorts one is ir laser the other receiver for the bounce back ...no doubt filtered to bounce off the retina

[@tsimeone]

Definitely love a tour

[@berberger4814]

Haha the "Gesundheit" at the beginning ❤

[@Equiluxe1]

You could turn it on with the cover off, just put a camera on a stand and leave the room to turn the power on remotely or use laser shields.

[@OmarMekkawy]

And finally we have our entertainment for today :D

[@fully_retractable]

Cylinder power, and axis are part of the refraction process.

[@Elektrotechniker]

The way Dave just said „Gesundheit“ after spelling out the Name of that Thing is gorgeous 😂 That‘s what us Germans use when someone sneezes!

[@complexity5545]

Good video. I'm down with the eye doctor visit/tour.

[@microsoftedge1878]

EXTREME TEARDOWN REQUIRED

[@electronpath]

+ 1 vote for Optometrist tour. Even though I have no problem with my eyesight :)

[@stevec00ps]

Look at those lovely red test points on the motherboard

[@antsgamingvideosn2b]

This bit of kit is a lot like what my local Specsavers uses (they use a different brand though).

[@NoLandMandi]

hands up! Yes!

[@ThatEngineerGuy_]

S3x on a stick! Thought the kit was dodge until I realized the joy stick moved the whole platform.

[@WolfmanDude]

Love the composite video output! Its such a simple, reliable solution for all things that dont need HD quality.

[@EEVblog]

Worked great.

[@echothehusky]

Those 8 side leds are clearly visible on the screen either side of the white ring

[@kevindonahue6066]

I bet that the camera at the bottom reads just the IR, and the upper camera just does the preview display

[@anthonywilliams7052]

WARNING!!!!! Don't look into the LASER with your remaining eye.

[@haydenkay-s1v]

wow now after breaking at the local hospital due to keratoconus i get to see inside

[@ikocheratcr]

Nice photos on Wikipedia page for Keratometer, thumbs up on that too.

[@marcop8273]

2170/01/06, please can you get an 2023-2033 sports almanac to this time?

[@codebeat4192]

Great machine for quality parts.

[@dinkc64]

Loved every minute of it, thanks Dave - just what I needed.

[@trollenz]

Nice gear 👌🏻

[@NoLandMandi]

I have mixed feeling about those, ferrite beads. I know why they use and how they work, but also never had any issue when I removed one either. seems they kinda needed but not going to be the end of the world if you remove one either!

[@seeigecannon]

I suspect the ferrites are mainly there to make the electrical noise people, like the FCC, happy.

[@SkyhawkSteve]

I spent a lot of time on EMC compliance. They are usually used to meet the local (or international) EMC standards. This means that they won't interfere with the radios, the cell phones, etc. Primarily, it means that the manufacturer won't get in trouble and have to pay fines. 🙂

[@EEVblog]

It's for conducted mode EMC compliance.

[@lasersbee]

2:41... Why did you buy it ? Are you changing Jobs ?

[@dpinkerton7441]

Who else wonders where our retina photos end up when we are tested for Glaucoma, could they end up with the camera footage taken from the side when we have our photos taken for our drivers licence,,,,,,,,,,,,, just putting it out there

[@deltacx1059]

16:38 you can see the light path, stay out of its way and you will be fine.

[@Ilanvain]

Very cool stuff

[@frankowalker4662]

Don't do a complete tear down, it would'nt be worth it. And yes, I would love to see a tour of an Optometrist's office.

[@pixiejisim5886]

I think you should make a periscope for your house with that mirror.🤣

[@drruncmd]

So its not a Shin and Nipple tester then? Aww!

[@Wtfinc]

*runs eye test* Results…..incomprehensible “It turns out i have an eyeball”

[@tiagoferreira086]

I know the things are constantly evolving and new machines and technology is better than ever in almost everything, but to see these kind of precision and expensive machines in pristine conditions be destroyed and scrapped makes me somewhat angry and sad... NMB motor for the win, great stuff, also that power supply is pretty neat, very symmetrical :)

[@Wespups]

I clicked on this cause I didn't know what half the words meant in the description, which is rare....

[@AirzonesBlasters]

Hand is up.

[@tehpwnerer6821]

to the optometrist ... let's go ❗👓

[@thenoblerot]

My guess is there's some kind of interferometry going on?

[@SolderBrothers]

Pretty Cool.

[@larry785]

As Spock would say... Fascinating

[@smellycat249]

This seems like an April 1 video title.

[@jacobtrapp3772]

EXTREMELY EXTREME TEAR DOWN BABY!!! Should be alright

[@chrisagler8472]

cool stuff. I got a prescription auto dispense computer, funny thing. it runs ubuntu and doom but is made for old windows embedded garbage. touch screen built in mouse keyboard and printer into the face of it... its neat

[@nixxonnor]

Very interesting peek inside teardown. Please do not take further apart. That would make me feel bad, destroying such a precision instru,ment in working order

[@skweek256]

Hah, interesting bit of kit, especially as I have Keratoconus!

[@skweek256]

And definitely yes to the tour...

[@BGTech1]

@@skweek256 same here, they scan my eyes every 3 months. Since I’m so young they are probably going to do the cross linking thing this fall

[@fully_retractable]

If you're interested in an optical coherence topographer let me know.

[@Soren_Marodoren]

Clean it and sell it. No destructive tear-down needed.

[@TheZombieSaints]

I'm getting ads for headband loupes now on KZbin 😂

[@NullStaticVoid]

Man I could really use one of these. So sick of half assed optometrists that give up too soon.

[@chuck10088]

👍 complete teardown. 👍 optometrist office tour.

[@20kilovolt]

17:12 look like a solenoid

[@tzisorey]

One of these things told me I have keratoconis.

[@deadmanwalking6342]

It all happened in the year of 2170

[@arcadeuk]

I don't think we even have optometry equipment this modern in the UK?

[@narc1408]

great idea to turn this into an arcade game :)

[@magnuswootton6181]

I cant read small print anymore. but Ill never get glasses, I just have to quit smoking.

[@JosefKopal]

What do you mean I want to keep it ??? Tear it apart .....

[@ableite]

8:13 - huh?!??😂😂😂

[@strange67x]

Gesundheit 🙂