Variables associated with ultraviolet transmittance measurements of intraocular lenses.
We measured the spectral transmittance of 12 intraocular lenses with a spectroradiometer system that uses an integrating sphere input. We evaluated both low- and high-power lenses and varied the input aperture size between 1, 3, and 5 mm. These variations caused a significant difference in the transmittance characteristics of the intraocular lenses. Most significantly, the transmittance of the low-power model was two to six times greater than that of the high-power model in the cutoff region. The larger aperture resulted in, at most, a factor of two difference in transmittance. This effect was observed in intraocular lenses labeled both ultraviolet-absorbing and nonultraviolet-absorbing.
Miller
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SA
United States Food and Drug Administration, Center for Devices and Radiological Health, Rockville, Maryland 20857.
James
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RH
D000042:Absorption; D006801:Humans; D007910:Lenses, Intraocular; D008875:Middle Aged; D011874:Radiometry / Q000295:instrumentation; D014466:Ultraviolet Rays