Method for evaluating an ocular optical lens and apparatus and memory medium therefor

A method for evaluating an ocular optical lens comprising steps of:

• arbitrarily selecting a first point corresponding to an inside of a lens shape of a first ocular optical lens, and, based on prism characteristics at the selected first point, generating a corresponding first visual region in which a specific first value of visual acuity is obtained;
• deliberately selecting a second point corresponding to an inside of a lens shape of a second ocular optical lens wherein the second point is selected to be equivalent to the first point, and, based on prism characteristics at the selected second point, generating a corresponding second visual region in which a specific second value of visual acuity is obtained;
• and
• displaying the first visual region and the second visual region on a single screen so that the first and second regions can be compared.

An apparatus for evaluating an ocular optical lens, the apparatus comprising:

• a data input for inputting data of an optical system, said data including an Abbe number, a lens dioptric power, a value of visual acuity, and a lens shape of an ocular optical lens;
• means for calculating a region of comfortable vision based on data inputted via the data input, wherein the region of comfortable vision is a region in which a desired value of visual acuity is obtained;
• and
• a display connected to display both the region of comfortable vision and the lens shape on a single screen so that the region of comfortable vision and the lens shape can be compared.

A memory medium readable by a computer and comprising a stored program for operating a computer, the program comprising:

• means for entering and processing data corresponding to an optical system of an ocular optical lens;
• means for generating a region of comfortable vision based on data entered and processed by the means for entering and processing data, wherein the region of comfortable vision corresponds to a specific value of visual acuity;
• and
• means for displaying the region of comfortable vision generated by the means for generating.