Abstract
The blue field entoptic test was applied to predict postoperative macular function in 125 patients (150 eyes) undergoing uncomplicated cataract operation. This test is based on the entoptic phenomenon, whereby one can observe one's own leukocytes flowing in the perifoveal retinal capillaries. The results were compared to those obtained with two commonly used tests: the two-light discrimination test and the color perception test. In predicting macular function; Those whose postoperative visual acuity reach 0.2 or better, 96% was found in positive blue field entoptic test, 78% was found in positive two-light discrimination test, 79% was found in positive color perception test. Those whose postoperative visual acuity of less than 0.2, 36% was found in positive blue field entoptic test, 24% was found in positive two-light discrimination test, 33% was found in positive color perception test. The blue field entoptic test is useful for evaluation of macular circulation and function in patients with media opacity, but has following limitations: 1. Some patients with normal retinal function cannot be made to understand the test. 2. Decrease of the transparence of blue light in the dense media opacity. 3. The blue field entoptic phenomenon can not be evoked on avascular area such as fovea centralis.
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