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Ophthalmic Assistant

Category - Lensometry and Spectacle Skills

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A plus lens is produced by

putting two prisms apex to apex.
putting two prisms base to base.
putting two prisms base to apex.
none of the above.

Explanation

Answer: B - putting two prisms base to base.

A plus lens is produced by putting two prisms base to base. Conversely, a negative lens is produced by putting two prisms apex to apex.

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