Role of electrophysiologic testing in the preoperative evaluation of corneal transplant patients

R. T. Wendel; Mark J Mannis; John L Keltner

Role of electrophysiologic testing in the preoperative evaluation of corneal transplant patients

R. T. Wendel, Mark J Mannis, John L Keltner

Ophthalmology and Vision Science

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We performed preoperative skin electrode bright-flash ERG and VEP testing on 32 patients undergoing elective penetrating keratoplasty. Twenty-six patients had unilaterally decreased vision and six had bilateral visual impairment. By combining our quantitative electroretinogram (ERG) and qualitative visual evoked potential (VEP) results with clinical findings, we were able to predict visual outcome in 92% of cases. Our findings suggest that (1) bright-flash ERG and VEP testing are useful adjunct studies to clinical and ultrasound findings in patients with media opacities, (2) comparison of a and b wave amplitudes with the fellow eye may yield prognostic information, (3) a normal ERG and VEP in the presence of an equivocal afferent pupillary defect may signal a good visual prognosis, and (4) ERG and VEP are not reliably predictive in patients with media opacity and amblyopia or macular disease.

Original language	English (US)
Pages (from-to)	788-793
Number of pages	6
Journal	Annals of Ophthalmology
Volume	16
Issue number	8
State	Published - 1984

ASJC Scopus subject areas

Medicine(all)

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title = "Role of electrophysiologic testing in the preoperative evaluation of corneal transplant patients",

abstract = "We performed preoperative skin electrode bright-flash ERG and VEP testing on 32 patients undergoing elective penetrating keratoplasty. Twenty-six patients had unilaterally decreased vision and six had bilateral visual impairment. By combining our quantitative electroretinogram (ERG) and qualitative visual evoked potential (VEP) results with clinical findings, we were able to predict visual outcome in 92% of cases. Our findings suggest that (1) bright-flash ERG and VEP testing are useful adjunct studies to clinical and ultrasound findings in patients with media opacities, (2) comparison of a and b wave amplitudes with the fellow eye may yield prognostic information, (3) a normal ERG and VEP in the presence of an equivocal afferent pupillary defect may signal a good visual prognosis, and (4) ERG and VEP are not reliably predictive in patients with media opacity and amblyopia or macular disease.",

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year = "1984",

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AU - Mannis, Mark J

AU - Keltner, John L

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AB - We performed preoperative skin electrode bright-flash ERG and VEP testing on 32 patients undergoing elective penetrating keratoplasty. Twenty-six patients had unilaterally decreased vision and six had bilateral visual impairment. By combining our quantitative electroretinogram (ERG) and qualitative visual evoked potential (VEP) results with clinical findings, we were able to predict visual outcome in 92% of cases. Our findings suggest that (1) bright-flash ERG and VEP testing are useful adjunct studies to clinical and ultrasound findings in patients with media opacities, (2) comparison of a and b wave amplitudes with the fellow eye may yield prognostic information, (3) a normal ERG and VEP in the presence of an equivocal afferent pupillary defect may signal a good visual prognosis, and (4) ERG and VEP are not reliably predictive in patients with media opacity and amblyopia or macular disease.

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