Explanation for good visual acuity in uncorrected residual hyperopia and presbyopia after radial keratotomy

R. P. Hemenger, A. Tomlinson, P. J. McDonnell

Research output: Contribution to journalArticlepeer-review

Abstract

It has been observed that, after radial keratotomy (RK), uncorrected residual hyperopes may have better visual acuity than expected and that some presbyopes, corrected only for distance, have adequate near-vision. We offer a possible explanation for these observations by showing that the increased spherical aberration after RK may produce a second focus 1.5 diopters or more in front of the principal focus of the eye.

Original languageEnglish (US)
Pages (from-to)1644-1646
Number of pages3
JournalInvestigative Ophthalmology and Visual Science
Volume31
Issue number8
StatePublished - Jan 1 1990
Externally publishedYes

Keywords

  • radial keratotomy
  • spherical aberration
  • vision correction

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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