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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.
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