Br J Ophthalmol. 2009 Jun;93(6):830-2. Epub 2008 Dec 5.
van der Meulen IJ, Porooshani H, van den Berg TJ.
AIM: To study forward light-scattering characteristics of calcified explanted intraocular lenses (IOLs) (Aquasense, Ophthalmic Innovation International Ontario).
METHODS: The amount of light scattered by the opacified IOLs was measured using a validated in vitro set-up for angles from 1.7 degrees to 22 degrees . This set-up gives results directly comparable with straylight values as valid for the in vivo situation.
RESULTS: Straylight is highest at large angles and declines steeply approaching 0 degrees angle. This corresponds to the in vivo findings that opacified IOLs cause important visual complaints but have little effect on visual acuity. At 7.5 degrees , log (s) is around 1.8 and 2.9 for the two lenses respectively. This corresponds to 8 x and 100 x increases in straylight values compared with values in young, normal eyes.
CONCLUSION: High straylight values caused by opacified IOLs can explain subjective complaints of reduced quality of vision in patients with opacified implants, despite good visual acuity.
PMID: 19060012 [PubMed - indexed for MEDLINE]