METHOD OF MANUFACTURING A PAIR OF SPECTACLE LENSES FOR THE IMPROVEMENT OF THE VISUAL PERFORMANCE IN PATIENTS WITH KERATOCONUS, AS WELL AS A SET OF SPECTACLE LENSES

摘要

In a method for the manufacture of a pair of spectacle glasses for the improvement of visual acuity in patients with keratoconus corrected with hard or soft contact lenses, use is made of a set of fitting glasses of which a sector at the underside of the fitting glass has a more positive or negative power. First, it is determined which of the patient's eyes has the lowest degree of keratoconus. Then, according to the normal rules of the subjective refraction, first, the best spherical glass is determined and then, from the set of fitting glasses, the most effective fitting lens is determined by applying different fitting lenses of that set of fitting lenses according to the method one by one to that eye while the patient looks with both eyes at optotypes. During the refraction the other eye can be branded. Then, a spectacle glass is manufactured for each eye with a power equal to that of the fitting glass chosen that has a sector with a power equal to the sum of the power of the sector of the selected fitting glass and the power of the spherical fitting glass.