May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Blue Light Absorption of the Crystalline Lens and Tinted and Not Tinted Intraocular Lenses
Author Affiliations & Notes
  • C. I. Tsika
    University of Crete, Heraklion, Greece
    Department of Ophthalmology,
  • G. A. Kontadakis
    University of Crete, Heraklion, Greece
    Department of Ophthalmology,
  • S. Plainis
    University of Crete, Heraklion, Greece
    Institute of Vision & Optics,
  • M. I. Makridaki
    Department of Optometry and Neuroscience, University of Manchester, Manchester, United Kingdom
  • M. K. Tsilimbaris
    Department of Ophthalmology, University Hospital of Heraklion, Heraklion, Greece
  • Footnotes
    Commercial Relationships  C.I. Tsika, None; G.A. Kontadakis, None; S. Plainis, None; M.I. Makridaki, None; M.K. Tsilimbaris, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 410. doi:https://doi.org/
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      C. I. Tsika, G. A. Kontadakis, S. Plainis, M. I. Makridaki, M. K. Tsilimbaris; Blue Light Absorption of the Crystalline Lens and Tinted and Not Tinted Intraocular Lenses. Invest. Ophthalmol. Vis. Sci. 2008;49(13):410. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To evaluate psychophysically the absorption of blue light by the crystalline lens and by tinted and and non-tinted IOLs after cataract surgery.

Methods: : The absorption of blue light was assessed in 29 patients (mean age 68, range 41-79) with variant density of nuclear senile cataract (0 to 3+), by measuring the parafoveal relative sensitivity of blue-green radiation using Heterochromatic Flicker Photometry (HFP) (MPS 9000 QuantifEYETM, ZeaVision©). 15 patients among them (mean age 66, range 41-78) underwent cataract or clear lens extraction. Tinted and not tinted IOL was implanted in a group of 6 patients (mean age 67, range 45-76) and 9 patients (mean age 65, range 41-78), respectively. At the 15th postoperative day HFP was repeated and the results were analyzed by non-parametric statistical tests.

Results: : A significant positive correlation was found between lens absorption and cataract density (r=0.5, p=0.006), at the pre-op group. At the follow-up measurements, there was a significant reduction in blue light absorption at the not tinted IOL group, compared to pre-op measurements (p=0.01), whereas at the tinted IOL group no significant difference was found (p=0.75). A significant difference in blue light absorption between the two different IOL groups (p=0.01) was also found postoperatively.

Conclusions: : The human crystalline lens absorbs more at the blue spectrum with the progression of cataract density. The tinted IOLs appears to mimic the light-attenuating characteristics of the ageing & cataractous lens This may offer protection to the retina from the photochemical damage caused by high energy short wavelength radiation.

Keywords: cataract • intraocular lens • radiation damage: light/UV 
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