Multifocal intraocular lenses and glare

Hiromi Akutsu, Gordon E. Legge, Andrew Luebker, Richard L. Lindstrom, Ralph W. Zabel, Virginia M. Kirby

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In a previous paper, we reported finding deficits in the contrast sensitivity functions of patients with diffractive multifocal intraocular lenses (IOL's). The results were consistent with optical measurements of the modulation transfer function (MTF) of the IOL. When this MTF is treated as a linear spatial frequency filter, it predicts the existence of a glare effect; contrast threshold for the recognition of target letters should be elevated by a bright, adjacent stimulus. We tested this prediction by measuring contrast thresholds for recognizing 0.2° Sloan letters on a background luminance of 11.2 cd/m2. The letters were presented inside bright (300 cd/m2) annular rings with inner diameters ranging from 0.42 to 1.22°. Thresholds were measured for seven multifocal subjects, age-matched groups of monofocal subjects and phakic-control subjects, and a young group. Multifocal subjects exhibited a greater glare effect than monofocal subjects, and they in turn exhibited a greater effect than phakic-control subjects. The observed glare effect for multifocal subjects was about twice that expected from the spatial filtering property of the multifocal IOL.

Original languageEnglish (US)
Pages (from-to)487-495
Number of pages9
JournalOptometry and Vision Science
Volume70
Issue number6
DOIs
StatePublished - Jun 1993

Keywords

  • Contrast sensitivity
  • Glare
  • Mtf
  • Multifocal intraocular lens

Fingerprint Dive into the research topics of 'Multifocal intraocular lenses and glare'. Together they form a unique fingerprint.

Cite this