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Hiroyuki Matsushima, Mayumi Nagata, Koichiro Mukai, Tadashi Senoo; Relationships between Light Scattering of Intraocular lens and Light Transmission. Invest. Ophthalmol. Vis. Sci. 2011;52(14):6209. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
Whitening (surface light scattering) and glistening (middle legion of scattering) are one of complications after hydrophobic acrylic intraocular lens (IOL) implantation. We suggested that light transmission decrease more than 10% may influent visual function, by analysis using explanted IOL. However, it is still difficult to decide the indication for exchange IOLs. In this study, we analyze the relationships between light scattering of IOL and light transmission using model eye.
Fourteen hydrophobic acrylic IOLs (AcrySof®, Alcon) were extracted because of IOL dislocation or visual disturbance, and those IOLs were occurred whitening and/or glistening. The extracted IOLs were stored in physiological saline at 33 °C. Light transmission in the visible range of 360-800 nm was measured using a spectrophotometer. Next, the extracted IOLs were placed in an eye model, and the IOLs were photographed at 0° and 90° with a Nidek EAS-1000 anterior chamber analyzer in a slit mode (flash level: 50W) and the intensity of light scattering (ILS) was determined in the surface and in the middle regions of the IOLs.
Light transmissions of the extracted IOLs were various; however, they were more than 10% decreased in the group of visual disturbances. The ILS in the group of visual disturbances was more than 60 CCT. The light transmissions were decreased year by year gradually(r=-0.47). The ILS in the surface was increased year by year(r=0.53). And there were negative correlation between the light transmission and the ILS in the surface (r=-0.50), and wavelength reliance was high in 430 nm (r=-0.71) and low in 500 (r=-0.58) and 800 (r=-0.27) nm. But there were no correlation between the light transmission and the ILS in the middle region (r=-0.35).
The surface light scattering of IOL decrease the light transmissions, and when the ILS in the surface was more than 60, a visual function may influence. Surface light scattering decreased the transmittance of short wavelength of visible light.
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