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Automatic perimetry (COMPETER). Ability to detect early glaucomatous field defects

A Heijl, S M Drance, G R Douglas

Archives of Ophthalmology (Chicago, Ill. : 1960)

|September 1, 1980

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Fully automatic computerized perimetry effectively detects early glaucomatous field damage, identifying 94% of defects. This advanced method shows promise for earlier glaucoma diagnosis compared to manual perimetry.

Area of Science:

Ophthalmology
Medical Technology

Background:

Early detection of glaucomatous field damage is crucial for preventing vision loss.
Manual perimetry, while standard, can be time-consuming and subjective.

Purpose of the Study:

To compare the efficacy of a fully automatic computerized perimetry system with manual perimetry in detecting early glaucomatous field defects.
To evaluate the diagnostic accuracy, including sensitivity and specificity, of the COMPETER automatic perimeter.

Main Methods:

A clinical study involving 104 patients: 51 with early glaucomatous defects, 20 glaucoma suspects, and 33 normal subjects.
Comparison of results from the COMPETER automatic perimeter (using actual threshold measurements) against static and kinetic manual perimetry.
Interpretation of automatic perimetry data using predetermined criteria.

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Main Results:

The automatic perimeter detected 94% of manually identified early glaucomatous defects.
It correctly identified 4% of fields misclassified as normal by manual perimetry.
An initial interpretation yielded 8% false-positives in normal fields; adjusting criteria increased sensitivity to 98% but raised false-positives to 22%.

Conclusions:

Fully automatic computerized perimetry demonstrates high sensitivity in detecting early glaucomatous field damage.
The COMPETER system shows potential for improving early glaucoma diagnosis, though interpretation criteria require careful consideration to balance sensitivity and specificity.