Patent ID: 8746885

Claim:
A method comprising: (a) using an optical apparatus to deliver light along at least a set of different paths such that during a period of time (i) each path in the set is from the optical apparatus through the crystalline lens of an eye of a human to the fovea of the eye, (ii) at a first time during the period, the light travels on a first path out of the set of paths, entering the crystalline lens at a first entrance point, (iii) at a second time during the period, the light travels on a second path out of the set of paths, entering the crystalline lens at a second entrance point, (iv) the first entrance point is different than the second entrance point, the first path is different than the second path, and the first time is different than the second time, and (v) the light does not travel on the second path at the first time and does not travel on the first path at the second time; (b) using an input device to accept input indicative of what the human perceives as the light travels along the different paths; and (c) using a processor to generate control signals for controlling delivery of light to the crystalline lens by the optical apparatus, and to calculate one or more cataract maps, based at least in part on data indicative of the input and data indicative of the paths traveled by the light.