Alcon Inc.
LIGHT EXPOSURE QUANTIFICATION STRATEGY FOR PREVENTING LIGHT TOXICITY DURING AN OPHTHALMIC PROCEDURE

Abstract:

A system and method quantify light exposure of a patient retina during an ophthalmic procedure. A light source illuminates the patient retina with directed light during the procedure to produce an illuminated retina surface. A camera collects image data of the illuminated retina surface. An electronic control unit (ECU) in communication with the camera and an indicator device receives the image data, calculates a cumulative energy spectral density of the directed light falling incident upon the retina, and executes a control action indicative of possible light toxicity in response to the cumulative energy spectral density exceeding a light toxicity threshold, including activating the indicator device. The illuminated retina surface may be divided into virtual zones, with the ECU mapping the cumulative energy spectral density to the illuminated retina surface. Each of the optional zones has a corresponding cumulative energy spectral density.