Bernell RIsley Rotarty Prism (Up to 30D)

Brand: Bernell


The Bernell RIsley Rotary Prism (Up to 30D) is an affordable Risley Prism that you can use for testing.

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This convenient testing tool utilizes a rotating knob to conveniently vary prism demand up to 30PD in each direction (eso/exo).

A prism before each eye can increase the demand of 60PD.

The prism is approximately 1″ in diameter.