Importance

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Abstract

A computer controlled subjective refractor includes a microcomputer based remote hand control connected to an enclosure which houses the optical elements of the refractor and which controls their operation for the examination of a patient. The enclosure has a beam splitter extending at its bottom and a forehead rest extending near its bottom such that a patient's eyes are positioned near the bottom of the enclosure to view into the beam splitter and thereby materially reduce accommodation which would otherwise interfere with the accurate refracting of the patient's eyes. Movement and position location of the optical elements are achieved through a microcomputer based electronic controller which is in communication with the microcomputer remote hand control. Additionally, a microcomputer based target projector assembly may be used to selectively project any of a wide number of images comprised of eye charts and the like for testing the patient's vision. The subjective refractor thereby provides a network of microcomputer based electronic controls for very accurately positioning a plurality of optical elements and determining their position in order to determine the refractive correction of a patient's eyes. The handheld remote control includes an optical display and a number of finger controls through which an operator may actively interact with the subjective refractor as the patient is examined.

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First Claim