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.
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Brand: Bernell
SKU: TE1BEARPHH30
The Bernell RIsley Rotary Prism is an affordable Risley Prism for ophthalmic testing. It utilizes a rotating knob to vary prism demand up to 30PD. Shop now.
CA$703.49
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.