Abstract
One of the functions of the iris is to control retinal irradiance. Whilst this is the case in most individuals, albinos, dueto a lack of ocular pigment found in their iris, have an inadequate pigment screen. This study was designed to examine and quantify the scattering properties of the iris in four Tyrosinase negative oculocutaneous albinos by measuring contrast detection when a small discrete light source was directed at the inferior iris. Three commercially available artificial iris contact lenses were then evaluated to determine how well they screened the retina from the source. The results suggest that a high water content dyed HEMA contact lens is as effective at shielding the iris as an Iris print lens.
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