Contrast sensitivity after penetrating keratoplasty

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

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Contrast sensitivity testing in the corneal transplant patient may enhance our assessment of visual performance, which is traditionally evaluated using Snellen acuity only. To evaluate contrast sensitivity function after penetrating keratoplasty, we studied 29 patients with anatomically successful corneal grafts and a best corrected visual acuity of 20/50 or better. Graft patients were compared with an age-matched control group including persons with comparable visual acuities without ocular disease. In addition to a complete ophthalmic examination, all subjects underwent contrast sensitivity testing using a computer-generated sinusoidal grating system as well as a commercially available contrast sensitivity wall chart. Data indicate that, despite comparable Snellen visual acuity, the contrast sensitivity curves for graft patients were depressed overall compared with those of normal subjects except at the lowest spatial frequency. However, comparison of grafted eyes to contralateral eyes with corneal disease in a small subset of patients with bilateral disease shows a trend toward higher contrast sensitivity values in the eyes that had been operated on. These data suggest that despite an improvement in contrast sensitivity with penetrating keratoplasty, an eye with a corneal transplant is not entirely normal from a visual standpoint. Nonacuity parameters may be important indexes for assessing real-world visual function in the graft patient, although the clinical role of these tests is not yet completely defined.

Original languageEnglish (US)
Pages (from-to)1220-1223
Number of pages4
JournalArchives of Ophthalmology
Volume105
Issue number9
StatePublished - 1987

Fingerprint

Penetrating Keratoplasty
Contrast Sensitivity
Transplants
Visual Acuity
Corneal Diseases
Eye Diseases
Research Design
Control Groups

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Mannis, M. J., Zadnik, K., Johnson, C. A., & Adams, C. (1987). Contrast sensitivity after penetrating keratoplasty. Archives of Ophthalmology, 105(9), 1220-1223.

Contrast sensitivity after penetrating keratoplasty. / Mannis, Mark J; Zadnik, K.; Johnson, C. A.; Adams, C.

In: Archives of Ophthalmology, Vol. 105, No. 9, 1987, p. 1220-1223.

Research output: Contribution to journalArticle

Mannis, MJ, Zadnik, K, Johnson, CA & Adams, C 1987, 'Contrast sensitivity after penetrating keratoplasty', Archives of Ophthalmology, vol. 105, no. 9, pp. 1220-1223.
Mannis MJ, Zadnik K, Johnson CA, Adams C. Contrast sensitivity after penetrating keratoplasty. Archives of Ophthalmology. 1987;105(9):1220-1223.
Mannis, Mark J ; Zadnik, K. ; Johnson, C. A. ; Adams, C. / Contrast sensitivity after penetrating keratoplasty. In: Archives of Ophthalmology. 1987 ; Vol. 105, No. 9. pp. 1220-1223.
@article{fe3800dbcc6e441bb078358fc0b6baf1,
title = "Contrast sensitivity after penetrating keratoplasty",
abstract = "Contrast sensitivity testing in the corneal transplant patient may enhance our assessment of visual performance, which is traditionally evaluated using Snellen acuity only. To evaluate contrast sensitivity function after penetrating keratoplasty, we studied 29 patients with anatomically successful corneal grafts and a best corrected visual acuity of 20/50 or better. Graft patients were compared with an age-matched control group including persons with comparable visual acuities without ocular disease. In addition to a complete ophthalmic examination, all subjects underwent contrast sensitivity testing using a computer-generated sinusoidal grating system as well as a commercially available contrast sensitivity wall chart. Data indicate that, despite comparable Snellen visual acuity, the contrast sensitivity curves for graft patients were depressed overall compared with those of normal subjects except at the lowest spatial frequency. However, comparison of grafted eyes to contralateral eyes with corneal disease in a small subset of patients with bilateral disease shows a trend toward higher contrast sensitivity values in the eyes that had been operated on. These data suggest that despite an improvement in contrast sensitivity with penetrating keratoplasty, an eye with a corneal transplant is not entirely normal from a visual standpoint. Nonacuity parameters may be important indexes for assessing real-world visual function in the graft patient, although the clinical role of these tests is not yet completely defined.",
author = "Mannis, {Mark J} and K. Zadnik and Johnson, {C. A.} and C. Adams",
year = "1987",
language = "English (US)",
volume = "105",
pages = "1220--1223",
journal = "JAMA Ophthalmology",
issn = "2168-6165",
publisher = "American Medical Association",
number = "9",

}

TY - JOUR

T1 - Contrast sensitivity after penetrating keratoplasty

AU - Mannis, Mark J

AU - Zadnik, K.

AU - Johnson, C. A.

AU - Adams, C.

PY - 1987

Y1 - 1987

N2 - Contrast sensitivity testing in the corneal transplant patient may enhance our assessment of visual performance, which is traditionally evaluated using Snellen acuity only. To evaluate contrast sensitivity function after penetrating keratoplasty, we studied 29 patients with anatomically successful corneal grafts and a best corrected visual acuity of 20/50 or better. Graft patients were compared with an age-matched control group including persons with comparable visual acuities without ocular disease. In addition to a complete ophthalmic examination, all subjects underwent contrast sensitivity testing using a computer-generated sinusoidal grating system as well as a commercially available contrast sensitivity wall chart. Data indicate that, despite comparable Snellen visual acuity, the contrast sensitivity curves for graft patients were depressed overall compared with those of normal subjects except at the lowest spatial frequency. However, comparison of grafted eyes to contralateral eyes with corneal disease in a small subset of patients with bilateral disease shows a trend toward higher contrast sensitivity values in the eyes that had been operated on. These data suggest that despite an improvement in contrast sensitivity with penetrating keratoplasty, an eye with a corneal transplant is not entirely normal from a visual standpoint. Nonacuity parameters may be important indexes for assessing real-world visual function in the graft patient, although the clinical role of these tests is not yet completely defined.

AB - Contrast sensitivity testing in the corneal transplant patient may enhance our assessment of visual performance, which is traditionally evaluated using Snellen acuity only. To evaluate contrast sensitivity function after penetrating keratoplasty, we studied 29 patients with anatomically successful corneal grafts and a best corrected visual acuity of 20/50 or better. Graft patients were compared with an age-matched control group including persons with comparable visual acuities without ocular disease. In addition to a complete ophthalmic examination, all subjects underwent contrast sensitivity testing using a computer-generated sinusoidal grating system as well as a commercially available contrast sensitivity wall chart. Data indicate that, despite comparable Snellen visual acuity, the contrast sensitivity curves for graft patients were depressed overall compared with those of normal subjects except at the lowest spatial frequency. However, comparison of grafted eyes to contralateral eyes with corneal disease in a small subset of patients with bilateral disease shows a trend toward higher contrast sensitivity values in the eyes that had been operated on. These data suggest that despite an improvement in contrast sensitivity with penetrating keratoplasty, an eye with a corneal transplant is not entirely normal from a visual standpoint. Nonacuity parameters may be important indexes for assessing real-world visual function in the graft patient, although the clinical role of these tests is not yet completely defined.

UR - http://www.scopus.com/inward/record.url?scp=0023187554&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0023187554&partnerID=8YFLogxK

M3 - Article

C2 - 3307719

AN - SCOPUS:0023187554

VL - 105

SP - 1220

EP - 1223

JO - JAMA Ophthalmology

JF - JAMA Ophthalmology

SN - 2168-6165

IS - 9

ER -