An apparatus for detecting ophthalmic diseases such as a cataract in the lens of a patient's eye which includes means for focussing a laser beam at a selected spot in the lens of an eye, and according to which the light back-scattered from the eye are photoelectrically detected and converted into an...http://www.google.fr/patents/US4711542?utm_source=gb-gplus-shareBrevet US4711542 - Ophthalmic disease detection apparatus
