Palm size autorefractor and fundus topographical mapping instrument

摘要: A schematic is disclosed for an optical instrument with a compact light path incorporation to hand held objective refraction of the eye. In particular, and after eye centering occurs, utilizing examiner patient sight automated indication using conventional Purkinje images, first second sources electronically bracket patient's gross sphere. Thereafter, source array registered on one or other side determined sphere prescription analyzed astigmatism. There results rapid particularly useful children whose limited attention span renders use more autorefractors not practicable.