1 : A method for determining a corrective lenses prescription for a person comprising, separately, for each eye of the person: determining a sphere prescription for the person via a 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, wherein the at least one input corresponds to a sphere measurement used to determine the sphere prescription of the corrective lenses prescription for the person.