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More cards in this set
Card 16
Front
How does this cause problems?
Back
Card 17
Front
How is short sight corrected?
Back
Card 18
Front
How is long sight corrected?
Back
Card 19
Front
What is astigmatism?
Back
Card 20
Front
How is astigmatism corrected?
Back
Card 21
Front
What does a prescription for a lens to correct astigmatism need to give?
Back
Card 22
Front
What is the aperture of the eye?
Back
Card 23
Front
What happens when circular fibres in the iris contract?
Back
Card 24
Front
What happens when radial fibres in the iris contract?
Back
Card 25
Front
What is the definition of focal length?
Back
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