Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1994-01-21
1996-03-19
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351205, 351216, A61B 310
Patent
active
055006981
ABSTRACT:
Techniques and retinoscopic apparatus for measuring or determining a patient's optical error are disclosed. The techniques include overrefraction and can be performed from a fixed position, avoiding the practitioner's need to move back and forth relative to the patient's eye. Equipment associated with the apparatus is adapted to record the location of the retinoscope slide (relative to its upper or lower position) during the examination to provide information concerning the optical error present in the patient's eye. Other associated equipment can include discs of spherical lenses and devices for limiting relative movement of components of the retinoscopic apparatus.
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Dang Hung Xuan
Russell Dean W.
Sikes William L.
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