Ophthalmic measuring instrument

Details Ophthalmic measuring instrument Ophthalmic measuring instrument

1976-06-17

1977-12-20

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

33278, 351 5, 351 40, 356 17, A61B 310, G01C 500

Patent

active

040638057

ABSTRACT:
A measuring instrument particularly adapted to making accurate measurements of portions of the eye and contact lenses is characterized by a split mirror system in which one mirror is fixed and a second mirror rotates upon movement of handle-pointer associated with a scale. The object to be measured is magnified, and the magnified image is split by the mirror system until opposite edges of the split image coincide, whereby a correlated linear measurement is indicated on the scale. The instrument includes a light to illuminate the work area and an attachment for measuring the diameter of contact lenses.

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