December 2002
Volume 43, Issue 13
Free
ARVO Annual Meeting Abstract  |   December 2002
The Contribution Of Off-axis Light To Edge Glare In Pseudophakic Dysphotopsia
Author Affiliations & Notes
  • LS Kwok
    Ophthalmology University of New South Wales Sydney Australia
  • MT Coroneo
    Ophthalmology University of New South Wales Sydney Australia
  • Footnotes
    Commercial Relationships   L.S. Kwok, None; M.T. Coroneo, None.
Investigative Ophthalmology & Visual Science December 2002, Vol.43, 441. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      LS Kwok, MT Coroneo; The Contribution Of Off-axis Light To Edge Glare In Pseudophakic Dysphotopsia . Invest. Ophthalmol. Vis. Sci. 2002;43(13):441.

      Download citation file:


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

      ×
  • Supplements
Abstract

Abstract: : Purpose:To quantify the role of peripheral light focusing due to off-axis light in the edge glare phenomenon associated with pseudophakic dysphotopsia. Methods:A model pseudophakic eye was constructed from the Kooijman wide-angle schematic eye combined with standard constants from the Holladay pseudophakic eye. Peripheral light focusing due to off-axis light incident on the temporal cornea was ray-traced in a model intraocular lens (IOL) of radius 7.2 mm, 6 mm dia, 0.72 mm centre thickness, and refractive index of 1.5597. Results:Light incident on the temporal cornea at oblique angles was able to strike the nasal portion of the IOL. The focusing was two or more times incident intensity. The critical incidence window at the temporal cornea was in the range 90 15 deg to the visual axis. The light focusing effect creates focused spots of light in the nasal edge region of the IOL. Conclusion:Off-axis light from the temporal cornea is able to form intense light spots in the nasal edge of the IOL. These spots constitute glare sources and may be of sufficient intensity to disturb vision. Our findings indicate that off-axis light may be an important contributor to some disability glare problems, and that IOL edge design should be re-evaluated to minimize dysphotopsia associated with peripheral focusing effects.

Keywords: 338 cataract • 550 refractive surgery: optical quality • 544 refractive surgery 
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×