Patent ID: 6540356
Filing Date: 2003-04-01
Classification: A61B

Abstract:
An apparatus for measuring aberrations in a human eye, comprising:light sources, including a light source for measurement composed of a set of light-emitting diodes (LEDs) arranged in a two-dimensional array and a light source for illumination; an optical system, including a measuring optical channel composed of a first lens, a first reflector, a transparent visual target on a liquid crystal display, a first beam-splitter and a second reflector, a control channel composed of a third lens and a fixed visual target between said light source for illumination and said first beam-splitter, and an integrated optical channel composed of a second beam-splitter, a second lens and a third reflector between said second reflector and the retina of the eye; means for changing the incident position of the incident light, including an LED driving circuit for lighting one of said LEDs in said array of said light source for measurement; means for changing the incident angle of the incident light, including a mouse for controlling the motion of said transparent visual target on the plane perpendicular to the direction of light propagation; and computer control means, connected to said LED driving circuit, said mouse and said liquid crystal display.