Soft & rigid lenses can have very light tints to improve their visibility when off the eye & to add the patient in handling them.

Soft & rigid lenses that alter the apparent eye color are available in cosmetic enhancement tints for people who have lighter eye & opaque tints for people who have darker eyes.

Such lenses typically have a clear central area of about 4mm for visual purposes & a clear annular peripheral area of about 1mm which overlays the sclera