Adjusting mechanism for changing the convergence of a pair of corrective lenses - magazines for binocular near point - and remote point eyes refraction, in particular for a phoropter

摘要

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 repositioning 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.