although these cuts would probably be less useful since they would be as pairs 180 degrees apart at a 6 mm optical zone and 30 to 90 degree extent and may be far enough away from the optical zone that they would not create much visual effect other medial opacities such as corneal scars corneal edema or cataracts could be simulated by creating central optical zone haze 14 or opacity of denser magnitude to decrease light transmission and increase light scatter scatter effects would be more important than reducing light transmission as sun glasses that have only 50 or 10 transmission may allow persons with normal vision to still see satisfactorily sufficient haze to reduce vision to say 20 50 or 20 60 would demonstrate moderate clinically significant disease and reductions to 20 200 or 20 400 would demonstrate advanced opacities wedge shaped clefts variable opacity and brown discoloration in the lenses would produce an effect similar to actual cataracts there are times when the patient will not be able to wear contact lenses with this being the case this invention supplies eyeglasses 17 with various markings simulating visual anomalies fig1 12 fig1 simulates starbursting and the hazing 12 and fig1 simulates glare 14 which may be experienced after rk and prk respectively the contact lenses of the invention could be worn piggyback fig1 and 14 that is the contact lens with the altered field of vision could be worn over the patient 39 s prescription contact lens fig1 and 14 with reference to fig1 the contact lens of this invention 10 with radial lines 12 is worn over the patient 39.