The method involves determining the average curvature of the cornea (16) of an eye (10), and determining the average phase error of the eye. The method involves determining the eye length (LA) from the average curvature and the average phase error, and determining the location of the eye fulcrum (ADL) from the eye length. Independent claims are included for the following: (1) a method for optimizing an individual eyeglass lens for an eye of a test subject； (2) a method for determining two optical parameters of eye having a reference structure； (3) a computer program with a program code provided for the execution of the method； (4) a device to the determination of eye fulcrum in eye of a test subject； and (5) a device for determining two optical parameters of eye having a reference structure.
