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Highly visible laser engraved axis markings (not sticker labels, as available on other models). Each contains 8-wells.
Quick and easy to use, improving examination efficiency.
Aid to test the dynamics and sustaining ability over time of relative accommodation directly and relative vergence indirectly.
Other uses include the demonstration of increased add powers on presbyopic prescriptions; demonstration of additional power additions at the multiple distances that are required for computer use, and pre-presbyopes who suffer from near vision asthenopia.