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The topography of normal corneas
1Lions Eye Research Laboratories, LSU Eye Center, LSU Medical Center School of Medicine, New Orleans 70112.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|April 1, 1989
Summary
This study analyzed normal corneal topography using photokeratographs. Findings reveal significant correlation in corneal power distribution between eyes, aiding in diagnosing vision-degrading corneal anomalies.
Area of Science:
- Ophthalmology
- Optometry
- Corneal Science
Background:
- Photokeratographs have been used to analyze corneal shape deformations.
- Understanding normal corneal topography is crucial for diagnosing anomalies.
Purpose of the Study:
- To survey the variety of corneal shapes in normal corneas.
- To establish baseline topographic features of normal corneas.
- To improve diagnosis of corneal shape anomalies affecting vision.
Main Methods:
- Analysis of photokeratographs from 22 individuals with normal corneas.
- Surveying corneal shapes in both eyes of each individual.
- Correlating centrally weighted corneal power with keratometric corneal power.
Main Results:
- High correlation of corneal power distribution was observed between the eyes of 18 out of 22 individuals.
- Significant variability in corneal topography exists between different individuals.
- Average centrally weighted corneal power strongly correlated with average keratometric corneal power (r = .96).
Conclusions:
- Defined topographic features of normal corneas provide a basis for diagnosing anomalies.
- Understanding normal corneal topography aids in assessing its role in vision degradation.
- Corneal topography exhibits high inter-eye correlation and inter-individual variability in normal subjects.