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Corneal thickness measurements and visual function abnormalities in ocular hypertensive patients
Felipe A Medeiros1, Pamela A Sample, Robert N Weinreb
1Hamilton Glaucoma Center and Visual Function Laboratory, Department of Ophthalmology, University of California, San Diego, La Jolla, California, USA.
American Journal of Ophthalmology
|February 5, 2003
Summary
Ocular hypertension patients with visual field loss detected by short-wavelength automated perimetry (SWAP) had thinner corneas. Central corneal thickness is crucial for assessing glaucoma risk in ocular hypertension.
Area of Science:
- Ophthalmology
- Glaucoma Research
- Corneal Physiology
Background:
- Ocular hypertension is often diagnosed based on intraocular pressure (IOP).
- Thicker corneas can lead to overestimated IOP, potentially misclassifying risk.
- Short-wavelength automated perimetry (SWAP) detects early functional damage.
Purpose of the Study:
- To determine the frequency of SWAP deficits in ocular hypertension patients.
- To correlate SWAP findings with central corneal thickness (CCT) in these patients.
Main Methods:
- Cross-sectional observational study of 68 ocular hypertension patients and 63 controls.
- Participants underwent standard automated perimetry (SAP), SWAP, and ultrasound pachymetry for CCT.
- CCT was compared between ocular hypertension patients with normal and abnormal visual fields, and with controls.
Main Results:
- 24% of ocular hypertension patients showed SWAP abnormalities; 6% showed SAP deficits.
- Ocular hypertension patients with abnormal SWAP had significantly lower CCT (545 µm) than those with normal SWAP (572 µm).
- Patients with normal SWAP had significantly higher CCT than controls (557 µm).
Conclusions:
- Ocular hypertension patients with SWAP visual field loss exhibit significantly lower CCT.
- CCT is a critical factor in assessing glaucomatous damage risk in ocular hypertension.
- Consider CCT in risk stratification for ocular hypertension to refine glaucoma management.