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Questions tagged [optometry]

the practice or profession of examining the eyes for visual defects and prescribing corrective lenses.

-1
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0answers
15 views

Why do I get a headache from wearing 0:00 (anti-glare) glasses? [on hold]

Some say headaches could be caused by the frame being too tight[1], I feel like I get them because of the actual glasses (they're right in front of my eyes!). I read online[2][3] that even ...
3
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1answer
43 views

Why are there different perscriptions for glasses and contacts? Help me see eye to eye on this

Why can't a prescription for glasses be used for contacts also? Isn't the eyesight still the same? At first, I cynically thought it was just another way for my optometrist to make money -- so he had ...
1
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0answers
10 views

Myopia advancing into Presbyopia and the Optics needed to correct them

This is a question about the optics needed to correct a hypothetical situation that everyone with Myopia will eventually encounter as they advance into older age. Given that a person has Myopia and ...
1
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0answers
17 views

is a prescription +1.00 diopter lens the same as over-the-counter lens in +1.00 magnifying glasses?

is a prescription for +1.00 diopter lens to treat far sightedness the same optical correction as an over-the-counter +1.00 magnifying glasses? Or do the "magnifying" glasses actually magnify like a ...
1
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0answers
12 views

Eyeglass prescription

Question edited as per advice. When prescribing eyeglasses, is there an aspect of balance between magnification and astigmatism correction? should the magnification strength be reduced when increasing ...
1
vote
0answers
9 views

How are the parameters of an astigmatic lens prescription related to the geometry?

Given is spherical optical power, cylindrical optical power in diopters and cylindrical angle in degrees. Also given is the base curve in millimeters, and the contact lens diameter in millimeters. ...
1
vote
2answers
28 views

Based on the metrics of two glasses prescriptions, can I deduce values of an intermediary prescription

Say I have this glasses prescription: OD -2.00 SPH +2.00 add 0.5 p.d. BD OS -1.00 -0.50 x 180 +2.00 add 0.5 p.d. BU And this prescription (values are fake): OD -1.70 SPH ...
2
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1answer
62 views

How to reduce the side effects of wearing contact lens? [closed]

This explains a lot of side effect of wearing contact lens. The type of contact lens Iam talking about is silicon hydrogel lenses. Questions: 1) Till how many hours can lens be worn continuously? 2)...
1
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0answers
22 views

Is it normal for it to take more than 3 weeks to get used to astigmatism correcting glasses?

Is it common or realistic in the optometry industry to suggest to someone that it may take 6 weeks to adjust to new glasses?
0
votes
1answer
34 views

How do blue light filtering lenses work? Is it possible that they could they negatively impact your vision?

I have had some recent trouble with my vision and while trying to figure out what was going on one of the possible factors was a blue light reflective coating on my lenses. While that has been mostly ...
2
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0answers
66 views

Is “voluntary accommodation” common?

I can't find any resource online about what I call "voluntary accommodation": the ability to contract the lens of the eye manually in order to blur or clear the vision. My optician advised me to ask a ...
2
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0answers
43 views

Why are topical corticosteroids used in conjunction with an antiviral to treat herpes keratitis?

Herpes simplex keratitis is a viral infection of the eye. Topical antiviral medications are used to treat the virus. Corticosteroids ophthalmic drops are sometimes used as well. But corticosteroids ...
2
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0answers
34 views

My left and right eye have a consistent, clear difference in color perception. Why?

Myself, my brother, and a friend of mine all have noticed independently that our left and right eyes perceive colour differently from the other eye. As compared to my vision with both eyes open, my ...
1
vote
1answer
35 views

Wearing under corrected diopter diving mask (hyperopia)

I have hyperoptia with roughly +5 diopters on both eyes and considering occasionally using diving mask for snorkeling in summer. The problem is, these masks usually come only up to +3.5 diopters and ...
1
vote
0answers
13 views

disorder of eye

my right eye no is -5.00 cyl.-1.50 sph at 170 axis and left eye no is -2.00 cyl.-9.00sph at 180 axis .what should I do to save it .as I am taking Co dorsal drops. science three years on doctors advice ...
0
votes
2answers
47 views

Contiuously wearing the same contact lens - ok? [closed]

Currently I'm using a contact lens for some short-sightedness. It's been around one month. Its validity is for only one month, now its validity expires. I'm using it and I had no issues. The ...
1
vote
0answers
43 views

Why are neck and shoulder pain a common symptom of Computer Vision Syndrom (CVS)?

I was learning about Computer Vision Syndrome (CVS) and I noticed that it said that one of the symptoms was "neck and shoulder pain". What confuses me is that CVS (or digital eye strain) seem to be a ...
1
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0answers
19 views

What is my eyesight

According to my glasses prescription, both of my eyes are (or need) -1.00. I know I'm nearsighted, and it's a low number so it's not too bad. I'm trying to find what this would be as far as 20 out of ...
1
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0answers
15 views

How important is having an anti-reflection layer on a glass lens?

There are many factors that play a role when a person chooses their next pair of glasses. For example, I would think that the exact material of the lens would be of crucial importance. Yet, it looks ...
2
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0answers
35 views

Does prolonged use of VR headsets harm your vision?

Virtual reality (VR) technology is starting to get to a point where it will become more common in the mainstream. The technology involves placing screens very close to your eyes to create the vision. ...
2
votes
0answers
31 views

Do eye doctors check for tunnel vision?

Whenever I go in for an eye exam, I am subjected to Snellen charts (where the letters only appear in the center of my field of vision), air puffs against my eyes, and a bright light shined into my ...
5
votes
0answers
132 views

How is the eye score interpreted?

I recently called my Optometrist to get my eye score so that I could buy my own glasses from the chemist. I was expecting to get a "+2" or "+1" or something like that but instead they gave me ...
2
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1answer
1k views

What effects would aspheric contact lenses have on eyes without astigmatism?

Aspheric lenses are used for treatment of astigmatism. I am curious what effects might happen if they were used by someone without an astigmatism. What effects would it have on visual acuity? ...
3
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0answers
115 views

Causes of rapidly-progressing myopia [closed]

Imagine a patient, say, Steve. Steve is 19 years old, and began experiencing signs of myopia at 10 or so. He spent years wearing glasses on and off, and progressed to a -1.5 prescription (with a ...
8
votes
1answer
2k views

Light Sensitivity as a result of Caffeine Intake

Is it possible that caffeine as a psychoactive chemical could produce an effect of light sensitivity in an individual or worsen an already present condition of light sensitivity? More specifically ...
9
votes
1answer
228 views

What is the distribution of corrected visual acuity?

While talking with friends about retina displays, resolution of TVs in relation to viewing distance, and so on, I pointed out that not everyone goes periodically to the eye doctor, unless the ...
7
votes
1answer
50k views

What is this dot on the iris?

I have a black dot on my iris. Is there a medical term for this? Can it be dangerous?
5
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1answer
55 views

What is a “contact lens fitting”?

When you go to get an eye exam, there is a fee. That fee includes the exam, vision tests, and prescription for glasses, if needed. If you need to get a prescription for contact lenses as well, there ...
9
votes
2answers
21k views

What are the different eyesight measures and how are they related to each other?

While searching about laser surgery for my myopia, I came across different system to measure the quality of individuals' eye sight. When speaking about quality of eyesight, I am referring to the ...
8
votes
1answer
108 views

Is eye patching effective for older children with amblyopia?

Parents of young children with amblyopia are often advised that vision in the weak eye can be improved by covering the healthy eye with an eye patch for a couple of hours every day. At what age does ...