Eye refractmeters using infrared rays

摘要

Eye refractmeter using infrared rays in which the target projecting optical system includes an aperture disc having a semicircular apertures disposed within a circle corresponding to the pupil of the patient's eye with chord portions thereof opposed to each other with a spacing therebetween. The observing optical system includes a disc having a slot located at a position corresponding to the space between the apertures. The apertures and the slots are located in conjugate with the patient's pupil with respect to the objective lens.