Patent ID: 7372646

Claim:
A pair of eyeglasses comprising: (I) a first adjustable focus lens system for adjusting focus in a viewing direction, said adjustable focus lens system comprising: A) a first lens unit and a second lens unit, each of said first and second lens units comprising at least one lens with each of the first and second lens units having at least one specially designed surface such that: (1) the combined thickness of the at least one lens of the first lens unit is complementary or substantially complementary to the combined thickness of the at least one lens of the second lens unit and (2) adjustments of the relative positions of the two said lens units in a direction perpendicular or approximately perpendicular to the viewing direction results in changes in the combined focusing power of the two lens units, and B) a motor driven adjustment mechanism for moving at least one of the lens units relative to the other lens unit in a direction perpendicular or approximately perpendicular to the viewing direction, based on a measured distance to a viewed object, so as to adjust the focusing power of the combined lens units and (II) a second adjustable focus lens system comprising: A) a first lens unit and a second lens unit, each of said first and second lens units comprising at least one lens with each of the first and second lens units having at least one specially designed surface such that: (1) the combined thickness of the at least one lens of the first lens unit is complementary or substantially complementary to the combined thickness of the at least one lens of the second lens unit and (2) adjustments of the relative positions of the two said lens units in a direction perpendicular or approximately perpendicular to the viewing direction results in changes in the combined focusing power of the two lens units, and B) a motor driven adjustment mechanism for moving at least one of the lens units relative to the other lens unit in a direction perpendicular or approximately perpendicular to the viewing direction, based on a measured distance to a viewed object, so as to adjust the focusing power of the combined lens units; (III) a frame in which said first and second lens systems are mounted.