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  • Title: Transmittance characteristics of ultraviolet and blue-light-filtering intraocular lenses.
    Author: Brockmann C, Schulz M, Laube T.
    Journal: J Cataract Refract Surg; 2008 Jul; 34(7):1161-6. PubMed ID: 18571086.
    Abstract:
    PURPOSE: To record the spectral transmittance curves of various ultraviolet (UV) and blue-light-filtering intraocular lenses (IOLs), evaluate their UV and blue-light-radiation- absorption capacities, and compare them with those of the natural crystalline lens. SETTING: Department of Ophthalmology, Duisburg-Essen University, Essen, Germany. METHODS: Eight IOLs from 6 manufacturers were evaluated. The transmittance of wavelengths from 200 nm to 800 nm was measured using a high-performance spectrophotometer with a diffuse transmittance accessory through a 1.5 mm aperture. RESULTS: All assessed IOLs provided good UVC (200 to 280 nm) and UVB (280 to 320 nm) protection, but 2 IOLs lacked sufficient UVA (320 to 400 nm) protection. Major differences in the absorption capacities were observed in the blue-light range (400 to 500 nm). CONCLUSIONS: The absorption characteristics of some UV and blue-light-filtering IOLs resembled those of the crystalline lens, but some differed. Long-term clinical trials should be performed to determine how blue-blocking IOLs affect the risk for progression of age-related macular degeneration.
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