What Is the Most Suitable Grid for Computer Perimetry in Glaucoma Patients?

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Abstract
100 eyes with suspected or proven glaucoma were examined with the Humphrey Field Analyzer 620 with 30–1 and 30–2 threshold tests, complementary 6 ° grids which combine to a 4.2° grid. The two tests were compared with each other in the resulting 68 pathological fields. 29 of them showed obvious differences in detection of scotomas. In 11 fields, the differences were so great that isolated consideration would have led to an incorrect staging of the glaucoma. Therefore, at present both tests should be applied in glaucoma cases. The frequency of different scotoma detection per test location was more than 10 times higher in the center than in the periphery. It is suggested that a program is developed with a 3 ° grid within 10° eccentricity, a 4.2° grid between 10° and 20° and a 6° grid between 20° and 30° eccentricity.

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