So nearsighted versus farsighted in this video I’m going to be reviewing what it means to be nearsighted so that you can better understand how our eyes and vision works So let’s take a look Hey everyone, welcome to dr. Eye health I am. Dr. Joseph Allen and here on this channel You’re gonna find education all about the eyes vision and finding the best vision products So if you new here consider subscribing Also at any point throughout the video check out the show notes and links below for further information about everything that we go over otherwise, let’s go right into the video So now to better understand nearsightedness versus farsightedness Let’s go over the basic fundamentals of how the eyes actually work Now when light hits objects all around us that light then bounces off those objects and enters into our eye When it hits our eye It goes through three different refractive Structures that help bend the light and these structures include the tear film the very front surface of the eye you have the cornea which is the window to the eye and then you have the crystalline lens and that’s the focusing lens inside of the eye when light goes through these structures Those structures actually bend the light and help focus it to the back of the eye and hopefully that light gets focused onto the human retina that retina is basically like the satellite dish that picks up all that light information and then sends it to the visual processing centers of the Brain, and that’s what gives you your eyesight now whether you have nearsightedness farsightedness or astigmatism we refer to that as refractive error and Refractive error means that the strength powers of the eye are either too strong They’re too weak or that the retina itself is either too far back in Reference to where that light is focusing or it’s too far forward and the end result is blurred vision however In most cases we can correct for that with glasses, contact lenses or corrective eye surgery to get that light to focus onto the retina correctly giving clearer vision. Now if somebody is nearsighted in the medical world We call that person having myopia or being myopic and that means that when they see things in the distance things are not in focus Things are too blurry However, when they’re looking up close at something like their phone then things are nice in focus They’re sharp. And again that person is nearsighted Now this happens because when an eye is fully relaxed looking in the distance The light isn’t focused cleanly onto the retina and in fact, the light is focused too strongly It converges in front of the retinal surface or it could be that the eyeball itself Is actually stretched out and is longer meaning that retina is pushed further behind where that light is focusing Actually when we fix or prescribe glasses or contact lenses to correct for nearsightedness We actually prescribe minus lenses these lenses are actually made to weaken the power of the eye and push that focusing light to the retina to help you see that is why when you look at a prescription for glasses for someone with nearsightedness you’ll actually see a little Minus symbol in front of those numbers now the reason for somebody who is nearsighted to be able to see up close Without any form of correction on has to do with some physical properties of light that comes off of near objects the light that comes off of a near object we call Divergent light and that means that the light is actually spreading outward from that near object Now the reason if somebody can see you’ll see up close With that divergent light is because it’s balanced out by the focusing powers of the eye and that makes the light land perfectly Onto the retina even without glasses and again, that’s why they can see clearly up close So that’s what it means to be nearsighted. Did you get all that now? Let’s compare that to someone with just the opposite. They are farsighted or in the medical world. We call that having hyperopia, or hypermetropia now, I explaining hyperopia or farsightedness is a little bit trickier than nearsightedness and that’s because of The involvement of the crystalline lens. Now the crystalline lens together is one of the focusing powers of the eye but the crystalline lens is under the influence of a muscle inside the eye called the ciliary body and when this muscle Flexes the lens inside the eye can change shape and therefore focus the light inside of the eye Hopefully to the retina on its own It’s actually one of the most amazing parts of the human eye And that’s the ability to focus light on its own just like a camera lens that done autofocus now an eye care We like to assume that the refractive powers of the crystalline lens are fully relaxed However, that’s not really true. Almost always people are using their eye muscles just a little bit In fact, it’s nearly impossible to fully relax your eye muscles on your own However, in the clinic we can use different medications in the form of eye drops to help relax those muscles completely and we call that a cycloplegic refraction and that gives us a lot more information about how somebody’s actually Utilizing their eye muscles and the exact refractive powers of the eye now for this example Let’s imagine somebody who is farsighted that cannot use their eye muscles at all And they’re looking in the distance in that case the light being focused inside of the eye is being focused to weakly It’s not strong enough and the light is actually focused behind the retina or it could be that the eye itself is too small and the light again is Focused again behind the retina and not giving us a clear image in that case somebody’s prescribed plus lenses These are magnifying lenses that actually help move that light in front Toward the retina giving them clear vision now in many cases somebody who is farsighted may not need glasses at all or for maybe not at least most of the time and that is because that focusing power of the eye if they are able to utilize their eye muscles and focus the crystalline lens inside the eye then it basically Acts like a magnifying lens. That is fluid and allows us to adjust its power again without needing that farsighted prescription However, the powers of that crystalline lens are limited In fact, that lens grows every year of life and as it gets bigger year after year The lens actually becomes more rigid and difficult to flex meaning that your power or ability to move that focusing plane Forward to the retina, it’s more difficult and more difficult over time, especially When somebody’s looking up close meaning that a lot of people who are farsighted again, they take the glasses off They can see pretty well, but when they’re looking up close it’s more difficult. So they need reading glasses in fact that’s really one of the reasons why a lot of people end up not having glasses until they’re 40s ended up needing glasses to read as they get older and we call that presbyopia Which has literally Latin for old eyes But when somebody is young and has the ability to focus that lens inside of the eye They can overcome quite a bit of farsightedness on their own without glasses the tough part is that some people are using those muscles all day long just to see clearly even that distance and eventually those muscles that whole Dynamic process of using those eye muscles and focusing can break down resulting in kind of a muscle spasm Inside the eye it can end up with eye fatigue or even really – things like headaches and so some people end up still needing to wear glasses for their Farsightedness at all distances just to help relax those eye muscles and prevent that eye fatigue and that’s it That’s basically the difference between nearsightedness and farsightedness However, when somebody is nearsighted or myopic it’s usually not that the focusing powers of the eye are too strong It’s more likely that the eye itself has grown and stretched out through adolescence and this can happen because of either genetic influences environmental factors But that I actually does tend to stretch out and that’s concerning for me as an eye care professional because when the eye starts to stretch out the higher amounts of nearsightedness are associated with different eye diseases that can potentially lead to vision loss and this can include cataracts glaucoma a certain condition called myopic maculopathy you can lead the eye floaters retinal tears and Detachments and even in some extreme cases the retina can actually stretch out so much that it begins to crack open And little blood vessels can grow inside the eye and those new blood vessels can destroy the retina completely So yeah, having excessive amounts of nearsightedness can put the eye at higher risk certain eye diseases It’s a major concern in fact in eye care There’s a whole growing kind of sub specialty called myopia control and that’s utilizing different strategies Different types of lenses to help influence the eyes us to slow down and stop it from progressing and growing longer and The entire point of that is to get slowed down and prevent these different diseases from occurring and becoming more prevalent Actually just recently did an interview with one of my doctor friends here in Minnesota. Dr. Roman Gerber of Wink Family Eye Care who’s very passionate about myopia control if you’d like to check out that video I have hooked up a link to that in the description below as well as in the YouTube card up above All right eye health question of the day. Are you near-sighted? Are you farsighted? Do you wear glasses do wear contacts or have you had some sort of corrective surgery like LASIK go ahead and comment in the section Below, I’d love to hear from you. Alright guys. Thanks so much for watching. Again. This is dr. Joe Allen hear from dr Eye health if you’d like to catch other cool videos hear from dr. Eye health Just click or tap the screen up here to the side or click or tap the screen down here Otherwise keep an eye on it and we’ll talk to you soon Being my often allow myopic better understand
❓ Eye Health QOTD 🔴 Are you nearsighted? Are you farsighted? Do you wear glasses, contact lenses or have you had corrective eye surgery?
I'm nearsighted. is it better to be nearsighted or farsighted? sounds like better to be farsighted
I'm nearsighted. is it better to be nearsighted or farsighted? sounds like better to be farsighted
Hey I am both nearsighted and farsighted. My left eye is nearsighted and my right eye is farsighted. I think what I have is called monocular vision in which my eyes don’t function as a pair
Thank you for this video. I'm nearsighted, and I do wear glasses. When you explained how people who are nearsighted can see very well up close, while objects at a distance are blurry, I was thinking – yep, that's me. Is nearsighted more common in people than farsighted ?
I found out I will need a vitrectomy someday…not looking forward to that (no pun intended)
I am nearsighted and wear glasses. My parents tell me that the most I use my glasses will make my sight worst. Is that true?
Wow I am learning so much Thank you! I've been nearsighted since about 12 and my daughter was a few years younger when she needed glasses for the same.
What time do you shooting a youtube video when nobody here?
I have degenerative myopia, and a lazy eye. It sucks to be blunt lol. I wear soft lenses that have to be custom made because they don’t make soft lenses in my prescription. I’ve worn hard lenses in the past and they were an absolute nightmare to wear and deal with. I also have the thick bottle cap glasses which I never wear in public because they make me extremely self conscious. Is my condition common?
PRK because my cornea wasn't thick enough?
Another great video! Thank you!!
How nearsighted can you get until you pretty much become both nearsighted and farsighted? Like, my prescription is -7.25 so I can’t see anything.
I also like the part where my eye is going to explode because it’s so big. That’s not worrying at all…
Which one, near or far is more likely to develop over time?
I'm nearsighted, i wear glass and contact lenses. Every year my eyes changing. In 2017 my eyes was Left -4.50 AND Right – 5.50 and in 2018 L – 4.50 R -5.00.
I had PRK in 1992 and one eye is now gone – 2.5. The other eye is still ok and does all the work. What's your experience with old PRK patients?
Where is the link to the interview with the other eye doctor?
Another excellent and highly educational video, dr. Allen. As a myopic viewer, I really appreciate it. I have an off-topic question. Do you know or think if there is or could be a connection between allergic conjunctivitis and eye floaters formation? I am asking because I have acari allergy and I had runny nose and red itchy watery eyes which resolved on their own. This happened several times for short time intervals (about 15 minutes). I just wondered if this condition could be a cause of my floaters besides the natural aging of the eyes. I am going to visit allergologist, whom I have previously gone to, and treat my chronic nasal congestion which makes sleeping difficult (I even thought I had sleep apnea, sinusitis, or problem with the nasal barrier but I went to
otorhinolaryngologist and he said everything is fine). However, I am curious how bad can allergies can affect our eyes. I am sorry if I bore you with my story.
Best regards,
Momchil
I’m nearsighted and I also have astigmatism. I started using glasses since I was 15y.o and now I tried using contact lenses only for special occasions. I just want to know if it’s safe to wear colored contact lenses if you have astigmatism? Thank you.
Very good information! Thank you!
is there cure when I wear my glasses my skin turn red cuts and get pumps and some have liquid as ears neck and nose in it there anything i can use Vaseline so i wont feel burning cuts over long time i don't remove my glasses until bed
I have a question today I noticed when I close my eyes I see zig zag lines I know this is a Scotsman but why it’s only for the first second every time I close my eyes
I’m nearsighted.
Does that mean a nearsighted person has to wear their prescription glasses/contacts to prevent eye from stretching and diseases?
Great video! Can you do one on lazy eyes? I’m farsighted with astigmatism +5.5L and +1.5R and to be honest I stopped wearing my glasses at 13. I’m now 30 and wear contact lenses occasionally. (They make me feel dizzy sometimes) My vision has improved over the years without wearing glasses, my left eye is still pretty weak though. Anyway I would love more information on amblyopia and if there are ways to help improve as an adult? As a kid I hated the eye patch so I refused to wear it, my optometrist said since my eye doesn’t turn out and that it’s not too noticeable that the surgery would not be worth it for me. It’s always been my biggest insecurity when having eye contact during a conversation wondering if the other person can tell or not.
Hi Joseph, would love it if you could share your thoughts on myopia and orthokeratology!
You are doing so much great work here! Keep it up!!
Mine needs to grow longer I am a + 8 from kindergarten what should I do
Im nearsighted. people think im nuts lol but ive found over the years out of sheer bordom that when i push on my eyeballs with no contacts in or glasses on If i push and gently pull in a certain way my vision becomes very clear, as soon as i release it goes back to blurry.
Is it still possible to bring back my 20/20 vision thru prescription glasses? Or using prescription glasses will just prevent it from getting worse?
Good overview of refractive errors. I have had hyperopia with astigmatism all my life but did not know it till a military eye exam at age 20. School nurse eye screening does not catch hyperopia, see a proper eye professional. Might have done better in school if I had been caught earlier. Now in my 60s and have had cataract surgery on both eyes. Still wear glasses but surprise was the right eye ended up with Simple Myopic Astigmatism post surgery. Glasses give me almost 20/20 acuity which makes me happy.
My eyesight keeps bouncing like it gets blurry then it's clear again but only when things are close to me does that mean I'm farsighted because I have no problems looking at far distances
Hi, I am from China and I am extremely myopic, my prescription is over -15D (diopters) accompany with -3.25D of astigmatism, does that mean that someday I will be blinded because of rentinal detachment??
@DoctorEyeHealth Try to talk about pinhole effect and the benefits of pinhole glasses in terms of these eye conditions. 🙂
Thank you for this video. I have been prescribed glasses(which I pick up next week) for far sightedness and did not really understand what that meant and doubted my diagnoses because my vision is poor at all distances. 6:58 onward summed it up perfectly for me.
Could you talk more about binocular vision disorders and problems because of it? I’m nearsighted and have a binocular vision disorder, so I struggle with focusing, consentrating and I have bad coordination. I used to have strabismus, it’s better now. Because I didn’t get help as a child, my eye doctor told me it’s basically too late to fix it, but I can make it stop getting worse by using prism glasses.
When I was younger, I was far more nearsighted than I am now. If the lens hardens with age, why would it be easier for me to focus as I age? I am 35 years old now, and my prescription has dropped from -1.75 to -0.75. (I also have a lazy eye which is worse, but it has also improved). When I was younger I also found it impossible to get stereoscopic vision effect cause of my lazy eye, my brain just discarded the information from that eye. Stereoscopic vision returned as I aged as well.
Can someone have both near and farsightedness? If so, how would this affect determining their prescription?
I don’t wear glasses but I’ve been seeing blurry from my right eye for over a year now. Lol
Two questions: are you wearing color contacts? And what do you recommend to do to stop my myopia from increasing?
Cool video. I'm nearsighted. I'm curious about contact lens care? I have a really bad habit of leaving my contacts in for days…
when I was younger I had better than 20/20 vision, but once I hit mid 40's I started becoming farsighted. I wear readers +1.50s most of the time, I switch to +2.00 when I am sewing. I got talked into trying continuum (I think that's the term) glasses because I spend a lot of time in front of a computer, the problem with those were I had to wear them low so that I could look over the top for distance and they were too heavy for that. So I wear readers at the end of my nose like an old lady. sigh
So I was wondering if you could explain accommodation issues? I’ve been told I am farsighted and that the muscles of my eyes over tighten and over relax causing a delay in my vision. I can see without my glasses it just takes about 30 seconds for my eyesight to switch between distances, my glasses just help stop that delay. Does this make sense? Hoping you could explain it better. Thanks!
Extremely nearsighted, to the point I have fallen asleep in my glasses because I want to still be able to see
Nearshighted
I am farsighted one eye +0,75 and other +4,0 is it really bad?
I lost my glasses 4months ago . im nearsighted. My optometrist told me if i drive i said no he said thank god 😂😂😂 we both but im glaucoma suspect for right now . went to see a specialist but they say i was born with a large optic nerve .
New subscriber here Doc! I wanna ask something. I am a near sighted. I dont wear contacts or eyeglasses ( i do before) and when I go outside, i cant open my eyes because of the light. Is there a solution to that? And im always having a Worse migraine huhu
i wear glasses cuz im nearsighted so things are far away seem blurry so my eydoctor tells me to wear my glasses all the time
I have 1 question. My friend sight is 20% out of 100% and he is nearsighted, so how much diopters he have?
I'm farsighted and nearsighted I'm just curious if I could wear eye contacts
Hi! I got glasses for the first time about 2 weeks ago. Based on my prescription, I believe I am farsighted with astigmatism in both eyes. With my glasses on, I can see nearby objects okay, but objects that are further away are very blurry. Is this normal? Is my prescription too strong? I thought it would have corrected by now. I am in dental school and my glasses are pretty much only useful while doing lab work where I have to look at objects up close, but walking up stairs/driving is pretty scary with the glasses on…HELP!
I have only one good eye. The left is a lazy eye and corrective surgery did not work at 20 yo. I had eye exercise at age 6 to 7 years to strengthen the right eye to 20/30. I have 7 eye disorders and it is hard to fit glasses on me. I have read and done a lot of eye education. YOU have explained eye problems the BEST I have ever seen. I have been going to specialist for over 60 years and I have learned more from you in one hour. Thank you sir.
I'm long sighted with astigmatism.
My vision has become worse over the past few years, where everything is blurry – especially when I'm tired and at night time.
Your videos have really helped me to understand my issues. Thank you!
hi sir What Is happening if my eyesight is Far and near At the same time Pls Help me😭
Youngest doctor ever.
I've been wearing glasses (far-sighted) since I was 8 (I'm now 44); at the time, the eye doctor said to my mother 'he CANNOT read <with his prescription>' even though I had been for years, and kept insisting that I could not read. hehe
Now of course, I cannot read without glasses.
So I’ve had the same prescription for almost two years sense I’ve been using contacts i have two astigmatism both at 70 axis not even that has change. Can it be the use of contact lens that has reduced strain on my eye? I started wearing lens about 5 years ago.
So… I’m 19 lol.. my prescription is L +7.50 and R +5.25.. I can’t go without them. I don’t think or remember my doctors ever telling me I had a stigmatism, but some sort of eye disease and I’m practically blind in my left eye.. any ideas??
I'm farsighted
Can you please be my future husband?
I’m very near sighted
can you cure myopia doc?
Nearsighted until I got Lasik ten years ago. Now I'm farsighted aand need reading glasses the age of 34. I feel old.
How close to your face should you be able to read? I had an exam but the letters were extremely close to my face and it was just hard to focus in on. He wasn’t an eye doctor it was just a physical.
When i look at something like my phone and i look up again i see things blurred but if i look far for some time its like my eyes kind of get used to it and see clearly again. Do I need glasses doc?
I just got an eye test today and I’m farsighted and I was wondering what it was and I’m glad I watched this video
I'm farsighted (I wear contacts), so this video was really interesting to me!
I'm currently living in South Korea. Fun fact: you might be surprised to find out that hyperopia is extremely rare among the Korean population; and as a result, many opticians here really aren't able to accurately prescribe for it at all. I was given prescriptions between +0.25 and +2.75 by various eye doctors last time I needed a check-up, and was even told by two different opticians that I have presbyopia. I have had glasses for farsightedness since I was 14! I've entirely given up now and just get my eyes tested when I visit my family back home! 🤣
yeet
I have a question… I am 47 and started using eyeglasses to read and look at my phone 3 years ago, it's gotten worst like when I wake up for some reason I have to wait a while before I start seeing better, I hate it so much! Does laser help? o what can you advise for this condition? maybe contacts? I don't want to use glasses anymore, especially because of my profession… if I use glasses they just get foggy, it sucks so bad!
Thanks now I know I'm near sighted I thought I was going blind. Lol but I have a question. I work during the night and I sleep during the day. Can this be a reason why I'm having problems seeing things clearly in the distance?
Quick question. So my prescription aka eyesight WITH glasses is 1.75. How do I know my eyesight WITHOUT GLASSES from that? Been searching everywhere & getting weird eye remedies instead lol
Hi Eye Doctor. If a 41 year old myopic whose prescription is -2.75 reduces her number to just -2, will she be able to read her phone comfortably? Will it be equivalent to wearing +0.75?? Thanks
fricking help. my left eye is nearsighted, my right eye is farsighted, sometimes when i try to look at near things my vision switches from left to right, left to right, left to right. same with looking at far things.
i hate my vision.
Kitty!!
I'm nearsighted, and have astigmatism. I wear glasses for it.
Why do my eyes change color?
I'm actually nearsighted in one eye, and farsighted in the other. Just wondering how often this condition occurs and how does it happen? Is it typically genetic? Maybe more of a nurture type situation? Currently wear both glasses and contacts, but tend to wear my glasses more due to allergies. I was actually told by my doctor that contacts are the better option as they correct the condition better than glasses. Thank you!
The plus side of being nearsighted is that everyone looks better instantly since the airbrush/blurring effect filter is permanently in the eye lolololol
This video really helped me out. I’m nearsighted with a astigmatism.
i was diagnosed as near sighted in first grade, i still dont wear my glasses😔
I'm nearsighted and I'm so bad I cant see bout 5ft in front of me if its normal writing and yes I wear glasses
Is it true all near sighted people will eventually become far sighted??
I am nearsighted
whats that in your eye its scary
I know some farsighted people who say they need glasses for close and far. How does farsightedness effect problems seeing far away with moderate to strong plus lenses? like +5 to +8 etc.?
I have compound myopic astigmatism :/
I'm near sighted… Now, I'm scared…
Is there any medicine to get rid of hypermetropia.