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Doctor insights on: Herbal Treatment For Decreased Visual Acuity

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Visual Acuity (Definition)

Visual acuity is the measure of the sharpness of vision. It is the most important measurement of eye function. In the us, the antiquated snellen visual acuity measurement is most often used. This is the "20/20" thing you have ...Read more


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11 month old diagnosed with decreased vision from visual acuity test (teller). However, prescription test after dilating the eyes shows no prescription needed. Eye health is normal. Why this conflict?

11 month old diagnosed with decreased vision from visual acuity test (teller). However, prescription test after dilating the eyes shows no prescription needed. Eye health is normal. Why this conflict?

The teller cards: Give a good estimate of visual acuity in children. But, since it is testing the first reaction of a child when the card is presented, things like tiredness or distractions can affect the accuracy. The prescription measured after dilation is more of an objective measurement and can be done accurately. Continue follow up as your eye doctor recommended. Be well. ...Read more

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When documenting visual acuity rating what do the numbers mean?

Ratio: The ratio is an indirect way of measuring how small of an object can be resolved independent of the distance at which it is viewed. For snellen fractions (20/20 for example), the top number is represents the testing distance and the bottom number is an indirect measurement of the size of the object. ...Read more

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Does everyone have the same visual acuity versus light intensity response curve?

Does everyone have the same visual acuity versus light intensity response curve?

No: Evan an individual can vary in visual acuity range and light sensitivity function depending on the above factors plus genetic factors. So there likely will be some spread in the above between different individuals. ...Read more

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Please help? Is the meaning of visual acuity- the "ability to discriminate between two points"?

Close: A better definition would be the measurement of the minimum distance at which two points can be distinguished as two. We use a very weird and ancient way to write this down called snellen acuity. ...Read more

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What does the sphere of my prescription say about my visual acuity?

Near-, or farsighted: If the first number (the sphere) on your prescription has a + notation before it, you are hyperopic (or farsighted), which means you can see better far away than up close (relatively). If there is a - in front of that first number, then you are myopic (nearsighted) which means you see better up close than far away, relatively. ...Read more

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What does the sphere of my prescription say about my visual acuity? What is sphere?

What does the sphere of my prescription say about my visual acuity?  What is sphere?

Near or far sighted: Sphere is the degree of near (minus power) or far (plus power) sightedness. For example, -3.00 sphere is 3 diopters of nearsightedness. -4.00 would be even more nearsightedness. Put a + in front of those numbers instead, and that would be farsightedness. Sphere does not include any astigmatism, a.K.A. Cylinder. ...Read more

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Is there a way to find out your visual acuity without consulting your doctor?

Visual chart: Many places have a visual chart on the wall and you can use this to determine your acuity. There are also charts on the internet which you can google and even an app or two. ...Read more

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How do I find out my visual acuity based on my eyeglass prescription? Is that possible?

How do I find out my visual acuity based on my eyeglass prescription?  Is that possible?

You don't: Your prescription is the power of the lens which gives you the best possible vision. It doesn't say anything about what that level of vision is. Your visual acuity is tested wearing your best correction. ...Read more

Dr. Abraham Jaskiel
57 doctors shared insights

Poor Vision (Definition)

Decreased visual acuity is a loss of visual clarity. It can be a normal part of aging, be nearsightedness or farsightedness, or be due to changes in the ...Read more


Dr. James Hocker
385 doctors shared insights

Phytotherapy (Definition)

This is ...Read more