The authors investigate if there is a significant difference in the number of cycles between the first and second 30-second (FASTS) periods of testing accommodative facility and vergence facility, and explore the possibility of reducing testing time by half. The study included 586 African school-aged children meeting inclusion criteria. Median age was 12 years; 52% male, 48% female. Normal stereoacuity was documented in 50.5% and decreased stereoacuity in the remainder. There were no clinically significant differences in FASTS of accommodative and vergence dynamics found between the first 30-second cycles multiplied by 2 and the full 1-minute test period cycles. The authors conclude that test times can be shortened for gross screening although further research is needed to fully evaluate diagnostic accuracy.
Testing periods for accommodative and vergence facilities
Reviewed by Fiona Rowe
Exploring reduction of prolonged binocular vision testing time: the agreement between the first and second thirty seconds within one minute of accommodative and vergence facility tests.
CONTRIBUTOR
Fiona Rowe (Prof)
Institute of Population Health, University of Liverpool, UK.
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