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A 45-year-old member asked:

can you tell me the minimum vision acuity?

2 doctor answers3 doctors weighed in
Dr. Richard Bensinger
Ophthalmology 52 years experience
Acuity: I am guessing that you want to know the minimum acuity for various legal categories. In most states, 20/40 is required in the best eye for a driver's license. In most states 20/30 in both eyes is required for a commercial license. 20/200 is the limit of legal blindness. The level for obtaining benefits for blindness varies from state to state and there are federal standards also.
Dr. Mary Reams
Ophthalmology 42 years experience
Clarify the question: Minimum acuity for what purpose? Driving? Reading? Or the best possible acuity? I.e. 20/10.

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Chordoma diplopia: Chordomas are rare, malignant tumors arising in the spine but which can spread elsewhere. Most are large when first discovered and if located at the base of the skull can affect the nerves to the eye muscles leading to visual doubling (diplopia). This, along with headache, is the most common early symptom of chordoma.
A 33-year-old member asked:

What could be the cause of a black spot in my vision when I blink?

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May be retinal: This may signifiy a problem with the retina. When you blink it stresses the retina with rapid changes in light intensity and may uncover a weaker spot. Should be looked at with a dilated examination by an ophthalmologist.
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A 24-year-old member asked:

When reading a book or looking at my computer, my vision becomes cloudy and black. Should I be worried?

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Maybe: The blackness should be differentiated from blurring. True blackness is a different problem and should be addressed immediately. The blur is usually caused by glasses or dry eyes. These are usually easy to remedy by on ophthalmologist.
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A 45-year-old member asked:

Can corrective lens make your vision worse?

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No: Glasses are designed to improve the focus of the eye and improve clarity. Sometimes patients who start wearing readers feel that their near focus becomes more difficult and to a certain extent this is true. But eventually, readers become essential whether glasses are used initially or not.
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A 37-year-old member asked:

What can I eat to improve my vision?

2 doctor answers4 doctors weighed in
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Well rounded diet: Deficiencies are unlikely with a healthy and varied diet. Eat lots of foods with beta carotene (yellow/orange), omega-3 acids for dry eye and vitamin e.

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Last updated Oct 10, 2018

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