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In vivo assessment of blue light attenuation of the crystalline lens and tinted and not tinted intraocular lenses
Author(s) -
KONTADAKIS GA,
TSIKA CI,
PLAINIS S,
MAKRIDAKI M,
MOSCHANDREAS I,
TSILIMBARIS MK
Publication year - 2008
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2008.5445.x
Subject(s) - ophthalmology , medicine , intraocular lens , blue light , attenuation , optometry , optics , materials science , optoelectronics , physics
Purpose To compare lens absorption in vivo, as estimated by blue light luminance perception, of patients with tinted IOLs versus patients with clear IOLs, and with their status before cataract surgery. Methods We tested 43 patients with variant density of nuclear senile cataract (18 had 0 to 1+ and 25 more than 1+), before and after lens extraction and IOL implantation. 21 received clear IOL and 22 the AcrySof® Natural (Alcon). The absorption of blue light was assessed by measuring the parafoveal relative sensitivity of blue‐green radiation using Heterochromatic Flicker Photometry (MPS 9000 QuantifEYETM, ZeaVision©). Results Preoperative results indicate that blue light attenuation is increasing with age. The postoperative results show that tinted IOLs absorb significantly more compared to clear IOLs (p<0.001). The difference in postoperative absorption with tinted IOLs from preoperative status was not statistically signifficant (p=0.3), and in the group of patients with 0 to 1+ cataract density the preoperative with the postoperative absorption was similar (p=0.941). On the contrary, the absorption of clear IOLs was significantly reduced postoperatively in the low cataract density group (p<0.001) and also in the total group of patients (p<0.001). Conclusion The tint may simulate the aged crystalline lens of patients with low cataract density in blue light attenuation.This may offer protection to the retina from the photochemical damage caused by high energy short wavelength radiation.