Refractive Errors Flashcards by Jessa shivo

Q

Myopia (M) is:

A

Simple minus powered sphere.

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Q

Hyperopia (H)

A

Simple plus power sphere

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Q

Simple Hyperopic Astigmatism (SHA) is:

A

1 meridian is Plano.
1 meridian is Plus.

(Check on power cross/total power)

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Q

Simple Myopic Astigmatism (SMA) is?

A

1 meridian is Plano.
1 meridian is Minus.

Check on power cross/true power.

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Q

Compound Hyperopic Astigmatism (CHA) is?

A

Both meridians are plus.

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Q

Compound Myopic Astigmatism (CMA) is?

A

Both meridians are minus.

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Q

Mixed Astigmatism (MA) is?

A

1 meridian is Plus.
1 meridian is Minus.

(Check on power cross/true power)

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