1. A method for determining a corrective lenses prescription for a person comprising, separately, for each eye of the person: determining a distance of the person from a computerized screen; and determining a sphere prescription for the person via the computerized screen and without the use of a refractor lens assembly, wherein determining the sphere prescription for the person comprises testing for the sphere prescription by: displaying a sphere figure to the person via the computerized screen and enabling the person to select at least one input, and using the at least one input in conjunction with the determined distance of the person from the computerized screen to calculate a sphere measurement that is used to determine the sphere prescription of the corrective lenses prescription for the person.