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AbstractP 078 Quantification of adsorption with yellow intraocular lenses Cordes A. K.1, Frentz M.2, Schrage N. F.1
1Dept. of Ophthalmology, Cologne Medical Centers, Merheim Hospital; 2Aachener Centre of Technology Transfer in Ophthalmology, ACTO e.V. Objective: There are multiple hints in the literature that blue light supports the development of an AMD. In vitro experiments and animal experiment could show that the highly energetic blue light can cause retinal damage. These results lead to the idea to implant yellow lenses to prevent this retinal damage. This study examined the characteristics oft adsorption of different yellow lenses of different manufacturers.
Methods: We examined following lenses: Hoya (AF-1(UY) YA-60BB); Alcon (SN60WF); Oculaid (PC440 Y Orange Series) and Human Optics (Microsil MS 612 Y) with refractive powers of +10,5; +21,0; +30,0 diopters. As reference we used an HumanOptics MS 612 with a refractive power of +21,0 diopters. The lenses were examined in a spectral photometer in water and silicon oil.
Results: In general we found that all lenses adsorbed light with wavelengths shorter than 400nm. Nevertheless the different lens models showed different characteristics of adsorption. The lenses manufactured by Hoya and Alcon showed an slow and steady increase in transmission until at 500nm full transmission was reached. The lenses by Oculaid showed the slowest increase in transmission of all lenses. Full transmission was reached at 550nm. The lens manufactured by HumanOptics showed a profile of adsorption comparable to an edge filter.
Conclusions: All lenses filtered the high energy blue light with wavelengths shorter than 400nm. We were able to show that the characteristics of adsorption are quite different. Long-term studys have to show which kind of profile is the best to prevent the phototoxic retinal damage. Differences in acceptance within patients might be explainable with these differences in the adsorption profiles.
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