There must be nonightblindness, there must be no diplopia— double vision—and the adaptation to glare must not exceed 70 seconds.
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In addition, there are checks on the sideways vision,nightblindnessand colour vision.
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Example from the Hansard archive. Contains Parliamentary information licensed under theOpen Parliament Licence v3.0
I found him to be suffering from a well-known degeneration of the back of the eye, of which the characteristic symptom isnightblindness.
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Regardless of age, about one of two professional drivers suffers from some form ofnightblindnessor enhanced susceptibility to dazzle.
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Completenightblindnessis a very rare condition, and such a general test would not be appropriate.
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Again, airmen suffer fromnightblindness.
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He is a man in well-to-do circumstances, was passed for general service, and subsequently found that he was unable to see at night; he was afflicted withnightblindness.
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Checks are also made onnightblindness, eye muscle balance, field of vision—this is sideways vision, which is very important in terms of accidents— and adaptation to glare.
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Initially a person suffering from choroideremia hasnightblindness, which begins in youth.
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Wikipedia
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