Preliminary studies identified rapid flicker sensitivity as an important biomarker in glaucoma, multiple sclerosis and ocular hypertension. Flicker-Plus was developed to investigate these early observations. The test measures rapid flicker thresholds at the fovea and in each of the four quadrants. A full study designed to measure how flicker thresholds vary in ‘healthy’ aging as a function of light level has been carried out and the results will soon be made available.
