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Doctor insights on: What Is The Best 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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My eyeglasses prescription is -8.00. What's a best guess at my snellen visual acuity?

With or without : It depends if you are corrected without any other eye issues then you probably can see 20/20. You cannot see snellen chart without correction therefore there is no measure for it. You probably can see near card at 4-6inches without correction. ...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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Is there a rough visual acuity test that I can easily perform?

Is there a rough visual acuity test that I can easily perform?

On line: You can "Google" Snellen acuity chart to get a rough idea of the vision. You can also compare the limits of your vision with someones vision who has known acuity. At your age, i assume that you have a driver's license and most likely have had to pass an acuity test to get that license approved. ...Read more

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Is there a way to find out your visual acuity with an app or website?

Vision screening: A rough acuity can be gained from any number of apps/sites - search for vision/eye exam and follow the instructions. If you are wondering about reading glasses - go to a place that sells them and they usually have a chart you can read with different readers on. None of this is as good as good eye exam. ...Read more

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Can docs explain what does visual acuity indicate?

Vision standard: In the USA the standard is the Snellen fraction of 20/20. The upper number means the letters are 20 feet away. The lower is the distance the normal could be to read the number. If someone is 20/200 at best, the letter is large enough that the 20/20 normal could be 200 feet away and still read it. Visual charts have a graded series of letter size to get the best fit. ...Read more

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What causes sensitivity to light changes for visual acuity?

Sensitive to light: Or photophobia is non specific. It can indicate problems with vision or if associated with headches and neck pain and fever can be from infection or meningitis. You need to watch your symptoms if worsening go to the er. If stable you might be able to go to an eye doctor instead. Any visiual changes should be seen by your eye doctor. ...Read more

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Does visual acuity decrease in cases of intracranial hypertension?

Does visual acuity decrease in cases of intracranial hypertension?

Sometimes: Many times patients develop transient obscurations of vision, or brief episodes of blurry vision. These are temporary if treatment ensues promptly. Long term high intracranial pressure can produce permanent defects in vision due to damage of the optic nerve. This condition needs to be closely monitored by both neurologists and ophthalmologists. ...Read more

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How can you calculate visual acuity based on eyeglass prescription?

How can you calculate visual acuity based on eyeglass prescription?

Simplistic: The simplistic answer is that a good optometrist/ophthalmologist knows what acuity corresponds with what prescription. I don't think you will find a formula to calculate this. ...Read more

Dr. Linda Callaghan
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