Convergence mechanism for binocular refracting instrument

Details Convergence mechanism for binocular refracting instrument Convergence mechanism for binocular refracting instrument

A - Human Necessities

61

B

88/121.5

A61B 3/02 (2006.01) A61B 3/04 (2006.01) A61B 3/10 (2006.01)

Patent

CA 1138696

?-3351 CONVERGENCE MECHANISM FOR HS/mf BINOCULAR REFRACTING INSTRUMENT -27-79 Abstract of the Disclosure A mechanism which has a continuously variable amount of convergence and inward movement over the entire range of pupillary distance (PD) settings is disclosed. The reposi- tioning of a pair of straight tracks transfers a continuously variable amount of motion to a pair of respective levers that control the position of a pair of carriages relative to the PD control and the angular relationship of lens batteries relative to the respective carriages.

342014

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