Schlieren optical system for refraction determination in refractive laser surgery equipment for ophthalmology is built into coaxial beam path of laser surgery equipment

摘要

Objective refraction is determined using the Foucault Schneider method. The system is built into the coaxial beam path of the refractive laser surgery equipment. The light source may be a point or line source, implemented using incandescent or laser light. The image is scanned using an electronic camera, and the grayscale content converted electronically to color tones.