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Eye test

Dingle_berry · 2016-07-16 21:29:38

Does anyone have any links to good, full explanations of the different eye tests done in an exam? E.g the test with four red lines in a + shape on black background - what's that called & for? What extra information does the circle of black dots on white background smeared diagonally give? The red and green stuff and you're…

16-07-2016 9:29pm

#1

Dingle_berry

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Does anyone have any links to good, full explanations of the different eye tests done in an exam?
E.g the test with four red lines in a + shape on black background - what's that called & for? What extra information does the circle of black dots on white background smeared diagonally give? The red and green stuff and you're asked which one is sharper?

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