Intro lecture Flashcards by Anna Crawford

Q

what is emmetropia

A

normal vision

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Q

what is hypermetropia

A

long sighted

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Q

what is myopia

A

short sighted

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Q

astigmatism

A

defect in eye

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Q

presbyopia

A

old age loss of eyesight

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Q

what type of lens is used for myopia

A

concave

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Q

what type of lens is used in hypermetropia

A

convex

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Q

is short sided + or -

A

-

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Q

is long sighted + or -

A

+

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Q

what happens in presbyopia

A

becomes difficult to see things close up

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