Authors: Masaki Tanito Tsutomu Okuno Yoshihisa Ishiba Akihiro Ohira
Publish Date: 2011/11/19
Volume: 56, Issue: 1, Pages: 82-90
Abstract
We measured the spectral transmittance in the wavelength range of 300–800 nm using a spectrophotometer for 63 IOLs including three clear IOLs N418B Nidek X60 Santen KS3Ai Staar Japan and four yellowtinted IOLs N418YG Nidek NX60 Santen KSAiN Staar Japan NM1 Hoya with three different lens powers The bluelight irradiance BLI values through the IOLs were calculated as the retinal hazard index for sungazing The data from three clear IOLs SA60AT Alcon Japan VA60BBR Hoya AU6K Kowa and three yellowtinted IOLs SN60AT Alcon Japan YA60BBR Hoya AU6N Kowa reported previously were also discussedExcept for the X60 the clear IOLs completely absorbed ultraviolet UV light and nearly completely transmitted visible light at wavelengths longer than 440 nm Yellowtinted IOLs absorbed more in the bluelight range 400–500 nm than clear IOLs All IOLs had lower BLI values than aphakic eyes and all yellowtinted IOLs had lower BLI values than phakic eyes The BLI values of the NX60 KSAiN NM1 SN60AT and YA60BBR IOLs decreased with the increase in lens powerCompared to aphakic eyes currently available UVblocking clear and yellowtinted IOLs reduce the BLI values by 43–82 However the data presented in this study are not directly applicable to humans implanted with IOLs or for the use of IOLs in a clinical situation since in those cases the balance between photoprotection and photoreception must be taken into accountThe authors are grateful to Nidek Aichi Japan Santen Osaka Japan Staar Japan Chiba Japan Hoya Tokyo Japan Alcon Japan Tokyo Japan and Kowa Tokyo Japan for providing the IOLs This work was supported in part by a GrantinAid for Young Scientist from The Ministry of Education Culture Sports Science and Technology to MT
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