Patent ID: 6636299
Filing Date: 2003-10-21
Classification: A61F

Abstract:
An intraocular lens inspection method comprising the steps of:executing an inspection intraocular lens extracting process for selecting a plurality of intraocular lens by way of a random extraction from an intraocular lens production lot; performing a high-temperature liquid immersion process for immersing said intraocular lens, which has been selected, in physiological saline isotonic having same environmental body fluid as in a clinical use, and keeping said intraocular lens for a specific amount of time at high temperature Th such that deterioration of the lens does not occur; promptly moving to a low-temperature liquid immersion process for removing said intraocular lens and transferring said removed intraocular lens to physiological saline that has been kept at low temperature Tl, which is approximately the same temperature as in a clinical use, and then observing said intraocular lens macroscopically; and upon observation of no changes in said intraocular lens, moving to an inspection process for removing said intraocular lens from said physiological saline and putting said intraocular lens in a room kept at said low-temperature Tl, gently washing a surface of said intraocular lens and then magnifyingly observing said intraocular lens by a microscope; and after observation, returning said intraocular lens quickly to an original state thereof, observing changes in said intraocular lens over time, and, upon a detection of glistenings that are consistent in terms of number and size, making a judgment that clinically analogous glistenings will develop.