An analysis of contrast sensitivity in identical twins with keratoconus

K. Zadnik, Mark J Mannis, C. A. Johnson

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We studied a pair of 36-year-old twins with keratoconus, one of whom had undergone bilateral penetrating keratoplasties. Both patients had final best corrected Snellen visual acuity of approximately 20/20. However, contrast sensitivity functions for the unoperated twin were abnormal when compared to the operated twin. In addition, contrast sensitivity data for the operated twin during and after a graft rejection indicate that corneal graft opacity and distortion can significantly alter the contrast sensitivity function. The unusual occurrence of identical twins with keratoconus afforded the unique opportunity to explore the visual and psychophysical aspects of keratoconus in a genetically controlled setting.

Original languageEnglish (US)
Pages (from-to)99-103
Number of pages5
JournalCornea
Volume3
Issue number2
StatePublished - 1984

Fingerprint

Keratoconus
Contrast Sensitivity
Monozygotic Twins
Corneal Opacity
Penetrating Keratoplasty
Graft Rejection
Visual Acuity
Transplants

ASJC Scopus subject areas

  • Ophthalmology

Cite this

An analysis of contrast sensitivity in identical twins with keratoconus. / Zadnik, K.; Mannis, Mark J; Johnson, C. A.

In: Cornea, Vol. 3, No. 2, 1984, p. 99-103.

Research output: Contribution to journalArticle

Zadnik, K, Mannis, MJ & Johnson, CA 1984, 'An analysis of contrast sensitivity in identical twins with keratoconus', Cornea, vol. 3, no. 2, pp. 99-103.
Zadnik, K. ; Mannis, Mark J ; Johnson, C. A. / An analysis of contrast sensitivity in identical twins with keratoconus. In: Cornea. 1984 ; Vol. 3, No. 2. pp. 99-103.
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