Abstract: A method, apparatus, and software for exercising human eyes with a monitor onto which is projected a plurality of shapes such that portions of the shapes have a contrast changing at a speed less than or equal to approximately 2.0 cycles/sec. The shapes comprise paired shapes of opposite colors (black/white, red/green, or blue/yellow, or combinations thereof), and the speed is preferably less than or equal to approximately 0.8 cycles/sec. Also a method, apparatus, and software projecting a plurality of symbols each comprising a plurality of bars one of which has a length different than that of others in the symbol. A visual efficiency is calculated based upon a number of identical symbols correctly located by a user and a time to locate the identical symbols.