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Br J Ophthalmol 2009;93:830-832 doi:10.1136/bjo.2008.151324
  • Laboratory science
    • Original Article

Light-scattering characteristics of explanted opacified Aquasense intraocular lenses

  1. I J E van der Meulen1,
  2. H Porooshani2,
  3. T J T P van den Berg3
  1. 1
    Department of Ophthalmology, Academic Medical Center, Amsterdam, The Netherlands
  2. 2
    Oxford Eye Hospital, Headington, Oxford, UK
  3. 3
    Netherlands Institute for Neuroscience, Netherlands Royal Academy, Amsterdam, The Netherlands
  1. Dr I van der Meulen, A2 Room 123.1, Department of Ophthalmology, Academic Medical Center, Meibergdreef 9, 1100 DD Amsterdam, The Netherlands; i.j.vandermeulen{at}amc.uva.nl
  • Accepted 12 November 2008
  • Published Online First 5 December 2008

Abstract

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° to 22°. 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° 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°, log (s) is around 1.8 and 2.9 for the two lenses respectively. This corresponds to 8× and 100× 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.

Footnotes

  • Competing interests: None.

  • Funding: This study was supported in part by Dutch Grant IS062031.

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