Patent ID: 7341350
Filing Date: 2008-03-11
Classification: A61B

Abstract:
1. A method for evaluating accommodation amplitude in an eye of a person comprising the steps of: subjecting said person to a near-vision visual acuity test, said test comprising at least one target having a plurality of optotypes displayed thereon, said optotypes on one said target having a different size than optotypes on another of said targets; determining a nearest point at which said person initially experiences blurring while viewing said optotypes on each said target; introducing one of a plus lens or a minus lens in front of said eye of said person as needed and having a dioptric power sufficient to locate said nearest point to within a predetermined range of distances from said eye, said minus lens of sufficient dioptric power being used to push said nearest point further away from said eye and into said range as needed, said plus lens of sufficient dioptric power being used to pull said nearest point closer to said eye and into said range as needed; and calculating said accommodation amplitude from a formula comprising (AA)=100/(distance in centimeters between said target and said eye at said nearest point)−(dioptric power of said plus or minus lens).