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The importance of controlled illumination in color vision testing in a pediatric ophthalmology clinical practice
D R Stager1, M Everett, W H Swanson
1Department of Ophthalmology, UT Southwestern Medical Center, Dallas.
Insights
Proper illumination is crucial for accurate color vision testing in children. Using controlled lighting with the AO-HRR or a self-illuminated test like the APT-5 minimizes false alarms and improves diagnostic reliability.
Area of Science:
- Ophthalmology
- Pediatric ophthalmology
- Vision science
Background:
- The AO-HRR pseudoisochromatic plates are standard for pediatric color vision screening.
- Clinical use often deviates from recommended procedures, particularly regarding illumination.
- Inconsistent illumination may affect test accuracy and diagnostic outcomes.
Purpose of the Study:
- To evaluate the impact of controlled illumination on color vision testing using the AO-HRR.
- To compare the AO-HRR with and without recommended illumination against a self-illuminated test (APT-5).
- To determine the role of illumination in false alarm rates during color vision screening.
Main Methods:
- 132 children (ages 3-16) underwent color vision testing.
- Tests included the AO-HRR with recommended illumination (MacBeth Easel Lamp) and without.
- The APT-5 Color Vision Tester served as a comparison standard.
Main Results:
- Failure rates were 22 (AO-HRR with illumination), 28 (AO-HRR without illumination), and 13 (APT-5).
- Statistical analysis (Cochran Q test) revealed significant differences between the groups (Q = 17.1, P < .001).
- False alarms were highest without recommended illumination and lowest with the APT-5.
Conclusions:
- Controlled illumination is essential for accurate color vision testing.
- The AO-HRR requires proper lighting for reliable results.
- Self-illuminated tests like the APT-5 offer a viable alternative with potentially fewer false alarms.
Abstract:
The AO-HRR pseudoisochromatic plates are commonly used for color vision testing in pediatric ophthalmology; however, the recommended procedure for obtaining proper illumination (a completely darkened room and standard illuminant) is typically not followed. To evaluate the role of the illuminant in clinical testing with the AO-HRR, 132 children, ages 3 to 16 years, were tested with and without the recommended illuminant (MacBeth Easel Lamp) and with the self-illuminated APT-5 Color Vision Tester. Twenty-two failed the AO-HRR with the recommended illuminant; 28 failed the AO-HRR without the illuminant. Only 13 failed the APT-5. The Cochran Q test for three related samples showed that the differences among the three groups were significant (Q = 17.1, P < .001). Diagnostic evaluation following clinical screening indicated that the differences among the tests were primarily due to false alarms, which were greatest without the recommended illuminant and least with the APT-5. These results demonstrate the importance of controlled illumination in color vision testing, either by using the recommended illumination with the AO-HRR or a self-illuminated test such as the APT-5.