Subjective eye refractive power measuring apparatus

摘要

The subjective eye refractive power measuring apparatus according to the present invention objectively measures the refractive power of an optical system to be tested. The subjective eye refractive power measuring apparatus comprises a measuring element that outputs a detection signal corresponding to the refractive power of the optical system to be tested, an arithmetic device that calculates a measured value related to the refractive power based upon an output signal from the measuring element, a determination device that determines whether or not specific conditions related to termination of a measuring operation are satisfied and a termination device that implements specific control for terminating a measuring operation when the judgement device has determined that specific conditions are satisfied. The conditions for terminating a measuring operation are based upon, at least, either a measured value obtained by the arithmetic device or the length of measurement time required for measurement. <IMAGE>