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Corneal topography. Corneascope

J J Rowsey, A E Reynolds, R Brown

Archives of Ophthalmology (Chicago, Ill. : 1960)

|June 1, 1981

Summary

A new clinical quantitative corneascope measures corneal topography, aiding in diagnosing conditions like keratoconus and assessing refractive states. This technology is crucial for evaluating eyes before keratorefractive surgery.

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Area of Science:

Ophthalmology
Optometry
Biomedical Engineering

Background:

Corneal topography irregularities significantly impact visual acuity and refractive status.
Accurate measurement of corneal contour is essential for diagnosing various ocular conditions and planning surgical interventions.

Purpose of the Study:

To introduce a clinical quantitative corneascope for detailed corneal topography measurement.
To demonstrate the instrument's utility in assessing normal and abnormal corneal shapes, including pathological conditions and post-surgical changes.

Main Methods:

Detailed description of the clinical quantitative corneascope and its measurement capabilities across all corneal meridians.
Review of diverse corneal contour presentations: normal myopic and hyperopic eyes, keratoconus, pellucid marginal degeneration.
Introduction of a modified Placido disk incorporating the corneascope's incident light imaging for rapid assessment of irregular corneas.

Main Results:

The corneascope provides comprehensive contour keratometry for detailed corneal analysis.
The instrument effectively visualizes and differentiates various corneal irregularities, including those associated with specific diseases and surgical outcomes.
A modified Placido disk facilitates quick identification of irregular corneal contours in an office setting.

Conclusions:

The clinical quantitative corneascope is a valuable tool for detailed corneal topography assessment.
Understanding corneal topography is critical for managing refractive errors and considering keratorefractive surgery.
The instrument aids in the diagnosis and management of conditions affecting corneal shape and visual function.

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