Eye testing device

Claim 1

In a vision testing apparatus including: a base, a light-occluding casing carried by said base; a drum member rotatably supported in said casing, means for rotating said drum member, said drum member having a periphery, said drum member having a vision test station disposed along said periphery of the drum member; an internal test pattern carried by said drum member in position to be selectively moved into alignment with the vision test station, said internal test pattern having a plurality of characters; viewing means carried by said casing including lens means adapted for optical alignment with said internal test pattern, the improvement comprising: a stage member external to said casing; an external test pattern, said external test pattern being supported by said stage member and having characters that are substantially identical to the internal test pattern characters; a slot in said casing, said slot being between said stage member and said vision test station on said drum member; remote designation means for simultaneously designating at least a certain one of the characters of said internal test pattern while simultaneously designating at least a certain one of the characters of said external test pattern, said certain character of the internal test pattern being the same as said certain character of the external test pattern; and said remote designation means includes a mask member overlying at least a portion of said stage member and at least a portion of said vision test station, said mask member having a one area and another area for simultaneously designating said certain character of the internal test pattern and said certain character of the external test pattern while simultaneously occluding portions of the internal and external test patterns other than said certain character.