Patent ID: 6726326
Filing Date: 2004-04-27
Classification: A61B

Abstract:
An observation apparatus, which comprises a variable power lens system and an imaging lens located on an observation path of the observation optical system extending from an objective lens to an eyepiece, in which:of the observation optical system, an observation optical system extending from the objective lens to the variable power lens system is an observation path for relaying as parallel light fluxes reflected light from an eye fundus of an operating eye to the variable power lens system; and of the observation optical system, an observation optical system extending from the variable power lens system to the imaging lens is an observation path for relaying as parallel light fluxes the reflected light fluxes obtained through the variable power lens system to the imaging lens, wherein an astigmatism canceling optical element is provided on the observation path of the observation optical system extending from the objective lens to the eyepiece, for canceling astigmatism power caused when optical members are held against the operating eye.