Q&A: I Answer Your Pressing Eye Questions | Knock Knock Eye
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- Опубликовано: 27 мар 2024
- This week on Knock Knock Eye, Will answers some questions that you asked on a RUclips community post, including are iOrganomic tips are actually good advice for computer users, are their eye exercises you can do that can you help you put off needing reading glasses, is blue light actually dangerous for your eyeballs, and much more!
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We want to hear YOUR stories (and medical puns)! Shoot us an email and say hi! knockknockhi@human-content.com
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![Eminem - Houdini [Official Music Video]](http://i.ytimg.com/vi/22tVWwmTie8/mqdefault.jpg)
Staying up late to avoid work is called "Revenge bedtime procrastination" and it's the bane of my existence
"You know what I could really go for? Someone just talking with enthusiasm about vision...."
People talking with enthusiasm about weird niche things is generally the kind of thing I seek out in my life.
ex-welder here. Start with a 14-shade, if too dark try a 12. Don't go lower than a 10-shade welding hood lens. You can often find them in big-box hardware stores that sell simple welders, not just specialty welder-supply companies. They block 100% of UV-A and UV-B, and are far darker than the darkest sunglasses you'll ever see.
I've been living in reading-glasses now for the last 5 years or so (50-y.o. M). They're like alien facehuggers at first, but you'll get used to them! Used to take them off all the time, but now I live in +2.00 drug-store glasses, just keep a few spares (one in coat, one at work, one typically on my face).
I love your plans for world domination! Such "chaotic-good" vibes :)
I think I looked it up and they said if you’re going to use welding glass that it should be 15.
And here's me giving myself eye strain by warching this on my phone at 3am 😂 (New Zealander here) but I must know all of the things about eyeballs 🤪
I've been blind in my right eye since birth (Septo-Optic Displaysia) and loved the how into the weeds you got on depth perception! I've been driving for 22 years. And parking is one of the hardest part. Though I've contributed part of that to my reduced peripheral vision. Until I was 8 I assumed those that saw out of both eyes saw 2 of everything. But it wasn't until I was 16 that I realized that my myoptic vision probably played a part in why I ran into things on the right side or tripped a lot or couldn't catch very well.
Same :(
Likewise! Optic nerve hypoplasia, left eye. Honestly, it was a great excuse for being terrible at baseball as a kid.
Took me a year to get good at driving again (parking, right turns near a curb, etc) after losing vision. 16:50 it was the depth perception. Took a long time to play racket sports again too.
I have SOD also & I'm blind in my right eye. I have a bunch of weird scars from scraping & running into things on my right. Parking really is one of the scarier things to learn with vision in one eye!
Been monocular since birth. I didn't realize that that also means I am not reading emotions properly AND then my facial expressions are slightly uncanny valley-ish. I read a fascinating article by a woman who got binocular vision late and how beautiful the world became and how she realized why she was so messy. BUT I am the only one in my family who enjoys heights (because I can mentally turn off "adjust for artificial 3-D" and everything looks flat
A good practical example of how you are able to perceive depth with one eye is video games. When you are playing video games, unless you're using a VR headset you rely on a flat image on a screen, and both your eyes are seeing the same image, and yet you are able to tell pretty easily the depth of the things you are seeing.
That's purely simulated motion parallax. Another simulation of distance is when a painting or photograph represents distance with blue haze.
I just do the blue light blocking on my phone, which I don't think actually does much, but I really like the way it dims the screen.
Here's a weird yet applicable question to ask an ophthalmologist: would you be willing to talk about sunscreen?
I've been searching for years for a sunscreen that can be used near the eyes that doesn't sting! Even plain zinc oxide likes to migrate up in there and burn. I don't know what to avoid, or what to look for. I'd even be happy buying a separate under eye product if it just didn't sting!
I am the approximate shade of paper. Fitzpatrick -1. Phlebotomists' dream. This current strategy of just not applying anything near the eyes and burning to a crisp is not working. To prepare for warmer weather, do you have any advice for the Glaucom-freckled?
Looking forward to you talking about MS. I have had so many bouts of optic neuritus the damage is pretty bad 😑
Driving with one 👀, so
“Drving”?
My dad had a retinal detachment in the mid-1950s, before modern innovations. He lost all but some peripheral vision-in his right eye. He drove until 1983, when his dementia was the reason he lost his license. He managed really well. Nobody would have known he had this issue.
Yay, it's Thursday. I love my weekly knock knock eye.
I would really like to hear more about double or misaligned vision. I have had this issue since early childhood and it's certainly made life interesting.
Please, never stop this series; it's just so good.
Keep up the good work and never change.
every time you say you're getting too far into the weeds, it's the part of the episode I'm enjoying most.
Somebody finally said the quiet part out loud! Staying up too late has multiple causes, physical and psychological, but I've never observed any diff between blue-block and not regarding sleep.
What it does do for me is filter some glare and harshness, helping with AuDHD sensory sensitivity. Even that is very subtle
I have a question! For me in particular, why does literally anything burn my eyes? Whether its swimming and opening my eyes underwater, shower spray, soap residue, eye lash, pollen......anything and everything. Are some people more affected than others and why? thx Dave
"An army of highly informed amateur ophthalmologists". On behalf of amateur surgeons everywhere, I salute you.
I must have missed the request for questions, but I do wonder: how does the continued existence of visine despite your repeated arguments make you feel?
I keep hearing "death perception". Knock knock eye has never been this macabre 😂
You can use special exclipse glasses that you can buy online. They are inexpensive but make sure they are ISO (I think that is the organization) certified. I survived the 2017 eclipse just fine. Also remember for those of you in the zone of totality you can take your eclipse glasses off and look at the sun directly ONLY during totality.
As a 40 year old with strabismus, I cannot wait for my friends to start feeling my pain with regards to depth perception. 😂
Thanks for the tip about using a welding helmet/glass for viewing the solar eclipse. I have a cheap helmet and a very expensive 3M helmet. It never occurred to me to use them. Great idea!
Wow, that whole "not wanting to go to sleep because of work the next morning" really resonated. I think that sentiment is a lot more common in healthcare workers than you would think.
Based on a quick Google search, this phenomena seems to be called 'revenge sleep procrastination' or 'bedtime procrastination'. It was popularized in the 2010s, with it being described as ""a phenomenon in which people who don't have much control over their daytime life refuse to sleep early in order to regain some sense of freedom during late night hours."
It would make sense that people with stressful jobs (hello, healthcare workers!) would be more prone to this. The long hours in clinic also don't leave enough time for spending time with family, decompression, and a full night's sleep.
For as long as that hair is getting I can’t help but feel we’re going to get another Neurologist skit shortly 😁
One of my eyes was a little irrated last week. I took the contact lense out, flicked a tiny hair off it, and put it back in. I was going into a meeting, so I had a little dry but ignored the itch for the 25 minutes. As I left, I gave a knuckle rub, thinking the lens was out of place, and the lens popped out onto my knuckle and was folded over. A closer look showed it was ripped in half and stuck together! Had no choice but to drive home with one eye, seeing clearly! Fortunately, I only live about 3.5 miles away!
It would be interesting to have an episode on all the ways pregnancy can affect the eye. I remember you mentioning it as a risk factor for the condition the guest had in the last episode.
Would love a little blurb about post-operative corneal abrasion. In our residency we have a treatment algorithm we created with ophthalmology for these patients but would enjoy a short discussion about this!
I can't quite figure out why his podcast are so fun to listen to high as a kite. Y'all should try it.
Could you talk about the ocular effects of myasthenia gravis ir ehlers danlos syndrome? I have both and they affect my vision in a few ways. Some people with EDS have a lot of ocular involvement, especially in a subtype called Brittle Cornea Syndrome.
#DepthPerception I drove for years when my eyes don't work together (monocular). I used to terrify friends and family describing the methods I used to tell distance. But . . . Unlike my friends using two eyes together, I have no actual idea how far anything is from anything else without measuring it.
Yep. I have a binocular vision dysfunction due to severe floaters. I do drive but I do need a lot more space between my car and other cars to feel comfortable changing lanes or turning left. When others would have turned or merged already, I oftentimes have to wait until it's abundantly clear to me that the other cars are definitely away at a large enough distance.
Thank you for talking about depth perception. I had strabismus when I was little and had surgery to straighten my eyes when I was 5 (in 1979). Before the surgery my depth perception was terrible. I used to run into things all the time like people, trees, etc. After the surgery my eyes appear straight but one eye is much stronger than the other. I fail the tests at the eye doctor for binocular vision, get horrible headaches and double vision at “3D” movies, and those “Magic Eye” pictures that went crazy in the 80’s are impossible for me to see. Weirdly, holograms I can see. I feel like I have depth perception as long as what I’m looking at is more than 3 or so feet away. If something is closer than that I sometimes mistakenly think it’s much closer. I’ve never heard an explanation of why I perceive close objects that way before. Thanks!
18:30 two eye depth perception seems to only work well when the object is close like < 2 meters/yards. If you have two eyes then you can close 1 eye at a time to see the different images.
This was great! I was curious about several of these questions, so it was lovely to get them discussed in detail :D
To add onto the pile of topics you already have lol - I had read that sunglasses that don't have UV blocking are actually harmful to the eye because your pupil is dilated and is thus technically letting more UV light in, even if it's easier to see in terms of visible light. I'm waiting another year for my vision insurance to reimburse another set of (prescription sun)glasses. Should I just not wear my UVB-protection-less prescription sunglasses in the meantime?
So regarding what the depth perception questioner asked about losing depth perception close up, I had something similar happen to me, although with a very clear cause: Wearing glasses.
My best guess as to what happened was: I developed an astigmatism starting probably in my late teens, but I ignored it until well into my 20s. My wakeup call was when my state rechecked my eyes for my license and I failed. So suddenly I had to do something about it and went to an optometrist possibly for the first time ever. When I first put on the glasses, I had two immediate "woah" moments:
1. Oh my god, trees have leaves!
2. Oh my god, everything within 10 feet of me is now painted on a flat sphere.
My best guess is that I'd gotten so used to the dropoff of fuzziness caused by my garbage vision that I'd started using that as a significant cue for my depth perception (brains are weird). The glasses making everything within 10 feet of me reasonably sharp and defined just ruined everything I understood about how far away it was. And for the first year or two of actually wearing my glasses, I had to take them off to go down stairs.
⁉️ Hey, Dr. W.E. Flanary ; In your opinion is the typical skin of eyelids (aging or otherwise) going to be positively amenable to exfoliating with a type of soft facial brush?
Would exfoliating assist in autophagy or apoptosis or collagen longevity?
Another thing people use subconsciously for depth perception that doesn't include binocular vision is light and shdow clues! there are some fascinatingoptical illusions that rely in this, but since our brains are so used to the sun being above us and traveling from east to west, we can determine convexity and concavity entirely based on the direction a shadow on an object is placed even in a 2d image!
I can answer this question without even a medical degree or anything (This applies to the UK, im not sure what the driving rules in America are). My dad lost his right eye in a car accident in his mid 20's. The DVLA here (Driver and Vehicle Licensing Agency) will allow you to drive on the road with one eye. My dad has been flying around on these roads all his life (even in his 60's). Also according to my dad apparently losing his eye made him a better driver. Because it made him better at judging gaps between spaces better. Which is quite useful in a country of thin roads and sharp corners. He doesn't have issues pulling out into roads either.
The boys at school were wondering what would happen if you looked at a solar eclipse with a pair of sunglasses on and how many sunglasses you would need to protect your eyes
Writing before watching-re. driving with one eye- Well, my dad only has one eye so, yeah, he drives with one eye. I have strabismus and it's often less visually confusing if I close one eye. So I often drive with one eye, too, although of course I can open the other if I need to. Even with both, I don't have stereopsis.
If you weren't used to navigating the world without binocular vision, I'm sure it would be alarming and potentially hazardous. If you're used to it, it's just "driving".
Personally, I've only been in one significant collision (bad for one of the vehicles, no people were hurt) and binocular vision wasn't the issue (a blind corner with iffy traction on a remote road was the issue). My father's probably a safer driver than I am. We both know where and how our vision limits us, and I think we're more careful in some contexts than most people would be, because we need to be.
Also, with regard to the person having difficulty with binocular depth perception when looking down-my experience, having never had binocular depth perception to start with, is that it's just best not to look down. My peripheral vision can handle stairs just fine. Most uneven ground (e.g., hiking in the mountains) is fine, too. If the ground is so rough that peripheral vision isn't enough, I probably need to slow way down regardless and proceed with caution.
Sometimes it feels like I need to look down to see what's going on, but if I give in to that temptation it's usually disorienting and sometimes screws with my balance. And my legs really just don't need me to point my foveas at the ground. They're built to run on automatic with peripheral vision, and they're good at it.
I also have a hypothesis on the whole blue light thing-crappy, blue-shifted color balance (i.e,. the color temperature is way too high) is the default for electronic screens and good fixes for this have only recently become widely available. I think some people are fine staring at screens that have crappy color, some people are bothered by it. The blue light glasses have the effect of lowering the perceived color temperature a little. Basically, it's using hardware to reduce a software problem. Just set the screen's color temperature lower.
So, I think the blue light thing is real, but it's "some people feel worse when looking at displays with awful color design" rather than "blue light is bad for you".
An analogy-suppose you're waiting for an appointment, and the only free chair in the waiting room faces a gigantic, nauseating painting. You're going to feel bad. Not because that particular shade of green is bad for you, but because you're staring at a gigantic, nauseating painting. Bad visual design has real psychological and physical effects.
Hahaha, I have veeeerrrrrry tiny astigmatism in one eye (so small that it was just caught this past year, & I'm 51) & rather a lot more in the other eye. I'm also extremely nearsighted in the same eye that has lots of astigmatism. As I age (of course), I'm losing my near vision in the eye that doesn't have much astigmatism. When I tried to get contacts a couple of years ago, I was told that I effectively have mono-vision & that I don't even really need to wear glasses if I don't want to (despite years of being told I should wear them. At first, I was told to wear my glasses when reading, watching TV, looking at the boar in class, etc. By the time I graduated college, I was told to go ahead & start wearing them all the time, especially once it became clear that my depth perception is wonky.) I told the optometrist that not wearing some form of correction is not really an option for me because I get MASSIVE headaches if I don't wear them & have to do much focus work (needlework & reading are two of my biggest passions, so um.. yeah).
Then at my most recent ophthalmologist visit, the doc acted like he'd never heard of giving people mono-vision... But one of the techs in the office also announced "So you don't wear your glasses most of the time, right." What? No, lady, I was wearing them as I walked in here. I didn't remove them until you started the exam. /smh
Oh, & I can't do contacts because of pretty severe dry eye in the one with bad astigmatism. (It's present in both, but the evaporation rate was double that of the other eye. Ol' Lefty is an over-achiever, here.)
Sending this to my friends who are shocked to hear I wear an eyepatch
Please talk about optic nerve atrophy!
Besides reversing presbyopia, where does fixing astigmatism figure in the ophthalmological final frontier?
Is there a difference to your eyes to using "night mode" instead of "day mode". Ie the black vs. white background .
The blue light blocking glasses don't do anything for me, but I do have a pair of Rx glasses with a light yellow "fashion tint" that are absolutely a godsend for eyestrain in really bright rooms/driving/screens.
I got cataracts and had them fixed, while waiting I watched videos on it which lead me here, and so I have been an amateur Opthalmologist for two years. And i got trifocal lenses, no reading glasses for me.
lol at LAN parties…that was me in college.
I have been blind in my left eye since 3rd grade. Thankfully, my right eye is perfectly fine so driving is fine.
What would cause vision to shake without the eyes moving? My brain also feels like it's shaking with one area being stronger than the rest. It happens intermittently and sometimes lasts longer than others.
I got the blue light thing for my glasses, but mostly because I play a lot of video games. Regularly right up until bedtime too lol I need all the help I can sleeping regularly 😅
First I get caught up on dr mike, then EMM, now a knock knock eye. This is shaping up to be a good day
I have 2 mostly functional eyes that were once upon a time 20/13 combined vision, but for whatever reason when driving with sunlight in my eyes or reading, I'd always close one eye. Driving with one eye was never a big deal as a result. This came in handy after my eye retinal detachment where I had to be patched for some time. No depth issues during that time whatsoever. Now for whatever reason due to the disparity in my eyes (the detachment had some macular involvement, but I'm at a solid 20/25+) optical illusions just don't work right which is hilarious to me.
Blind in one eye since birth and I would lie that I saw the "magic eye" illusions or 3D. Finally at 16 I learned that those work by forcing each eye to see something different so it's impossible for me.
@DorkQueen23 but not just the 3d images either, other perspective illusions too like lines that are supposed to look longer or an image that should appear to spin, even when I'm binoc.
If you get cat hair in your eye, is it the same deal as eyelashes?
Are there any long term concerns about adie’s pupil? I have both adie’s pupil and double elevator palsy in the same eye. Interestingly enough, I have adies pupil and hyperhidrosis but not loss of deep tendon reflexes so no horner's syndrome.
Interesting historical tidbit, but you can even get an ATP license - to fly a passenger jet - with one eye. A famous pilot who landed a jet on a levee in NOLA in the 80s or 90s - with no injuries - only had 1 eye.
Hello, dr Glaucomflecken! I just wanted to let you know that you’re responsible for me choosing PM&R for my residency 😅 Now everyone is asking me if I could massage them, are you happy.
on a side note have you seen the steve mould video about rotating your corneas?
My mother did it.I was an adult before she told me she only had vision in one eye.
I'd love a serious deep dive on the whole depth perception/binocular vision thing. I was always told I don't have binocular vision because I don't use my eyes together. Supposedly they switch rapidly and my brain puts it together. As a kid I'd always try to grab the fly wings off the paper at the eye doctor's because, as best I could tell, it was a flat picture. Yet at a recent eye exam, done before cataract surgery by one of Dr. G's co-conspirators, (surgery was today!) the doctor pulled out the old fly and the wings did seem to be raised. However I "flunked" a couple of the other tests for depth perception. So what's up with all this? This is why I'd like a really deep dive into the whole depth perception and binocular vision. What's going on here.
They have so many cute eye glasses now compared to when I was a kid.
And the direct order ones have gotten inexpensive enough that you can have multiple pairs - I remember what a crisis it was as a kid if the leg broke or the screw came out of the hinge, because there was no backup.
I had cataract surgery with multi focal lenses 2-3 months ago, and it’s the first time since 1966 (with the exception of a few attempts at contacts) that I haven’t had to wear glasses. It is absolutely amazing.
Could you please do a show about dealing with Driving at Night? Helpful tips? How not to kill yourself and others when driving at night? 🖤 Thanks !
I posted some questions / comments in facebook messenger…
I have perfect 20 20 vision, no issues, but now at 38 years old I find that it's extremely difficult to drive at night; the headlights coming at me or in my rear view mirror make it almost impossible to see more than about 200ft in front of me when driving, what if anything could I do to remedy this and could glasses help me? In daylight my eyes are probably better than perfect, I am an excellent marksman and can see and read detail at 100ft or more during daylight, but at night that goes down to about 20 ft and it's alarming to me, any help you could offer is appreciated. Thanks!
Do you see starburst/halos around headlights at night?
@@spikygreen only when there's particularly bright lights pointed at me, but streetlights and headlights cause the most problems.
@@jasonburguess do you have floaters? Especially clouds of tiny dots that you may or may not be able to see without squinting while looking at a light source. It could be other things too, e.g. cornea irregularities. In my case, I developed a cloud of tiny dot floaters (maybe a couple hundreds of them) right in the center of my left eye, and that made driving at night extremely tough because each dot reflects and disperses the light. Every headlight of every car in the upcoming traffic now has a starburst around it three times the size of the car. Same with street lights and traffic lights. It feels like I live in an impressionist painting now!
@@jasonburguess sorry I don't know of anything that could help (other than having a vitrectomy, which is what I'm going to do, but my floaters are pretty extreme and interfere with my vision during the daytime as well). Just wanted to say I can appreciate how awful it is to have this problem.
My teenage son has “visual snow”. I want him to see an ophthalmologist, but he says it’s no big deal. Should I be worried (I’m worried).
He'll be upset if you force him to go but when he's older and eventually goes to an ophthalmologist he will blame you if it was reversible only when treated early. Just food for thought my friend
Yeah, LAN parties, woo!
Weird my comment asking to talk to doctors from Gaza in an interview was deleted
Don't press your eyes.
Next question.
Neat discussion on depth perception. I have a congenital muscle weakness in my right eye. If I get tired, my right eye rotates out. Like almost as far to the outside it can go. I wear glasses with prisms to keep my wayward eye focusing with my left eye as much as possible. When my right eye wanders out, I rarely see two images. Instead, my left eye takes over and I see everything from one eye. I am so used to this that I am not even aware when my left eye takes over. I have driven for years without incident.
Why does Ehler-Danlos Syndrome seem to cause temporary monocular vision loss? How is the eye connected to this connective tissue group of 31 diseases?
Driving with one eye sounds risky but doable. Doctors have been driving around for last 3 years with their heads in their asses so 1 eye driving perfectly safe and effective.
Birds have eyes on the sides of their heads. How does that work?
Prey animals tend to have eyes on the sides of their heads so they can see as much of the world as possible at all times. Predator animals tend to have eyes on the front of their head so they can get good depth perception on a single prey animal.
In my state, you’re not allowed to drive if you don’t have binocular vision.
Really what state is that? So people with only one eye can't drive in your state?
@@Passionatpropagator Correct.
@@ferretyluv But what state do you live in? Just curious. I thought all states would let someone with only one eye drive, assuming everything else was fine.
@@Passionatpropagator I’m not doxxing myself. I only know this because I had an ex who was an extreme premie so he had no binocular vision and was told by the state DMV that he can’t drive. We were both in high school.
I had melanoma in my right eye (removed 5 years ago). Now with immuno tx doing fantastic.