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Ophthalmic Assistant

Category - Lensometry and Spectacle Skills

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Convex lenses have what type of dioptric value?

Positive
Negative
Neutral
None of the above

Explanation

Answer: A - Positive

Convex lenses have a positive dioptric value and are usually prescribed in order to treat hyperopia. They are also prescribed as a reading aid to patients with presbyopia.

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