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Computer analysis of the optic cup in glaucoma.

V R Algazi, J L Keltner, C A Johnson

Investigative Ophthalmology & Visual Science

|December 1, 1985

Summary

Computer analysis of optic disc images helps detect glaucoma progression. Two digital image processing methods monitor optic disc changes, aiding clinical and research efforts in identifying glaucomatous optic cupping.

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Area of Science:

Ophthalmology
Medical Imaging
Computer Science

Background:

Glaucoma is a leading cause of irreversible blindness worldwide.
Early detection and monitoring of glaucomatous optic cupping are crucial for managing the disease.
Current methods for optic disc assessment can be subjective and time-consuming.

Purpose of the Study:

To describe two complementary computer-aided methods for analyzing the optic disc in glaucoma.
To enable user-intervention for detecting and monitoring optic disc changes using digital image processing.
To assess the utility of these techniques in clinical and research settings.

Main Methods:

Method 1: Digitizing, scaling, and registering serial optic disc photographs (monocular or stereo) for sequential display, highlighting changes as movement.
Method 2: Digitizing stereo optic disc photographs and applying a novel photogrammetric algorithm to quantify optic cup depth.
Both methods utilize digital image processing for optic disc analysis.

Main Results:

The first method visually detects changes in the optic disc by displaying sequential images, where alterations appear as movement.
The second method provides quantitative depth information of the optic cup from stereo images.
These complementary techniques offer robust analysis of optic disc morphology.

Conclusions:

The described computer analysis methods provide valuable tools for detecting and monitoring glaucomatous optic cupping.
These techniques can enhance the accuracy and efficiency of glaucoma assessment in both clinical practice and research.
The integration of digital image processing and user intervention facilitates objective monitoring of optic disc changes.

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