A new test for peripheral visual acuity was run on a 25 cm. perimeter (AO 450) fitted with a specially built illuminator. Surroundings and operator were blacked out. A 75 mm. sq. carrier held Landolt broken circles with breaks of 1/2, 1, 1 1/2, 2, 2 1/2, 3, 4, 5, 6, 7, 8. 9, and 10 mm. With the eye fixed the subject identified the position of the break in successively smaller circles. Success depended on 4 consecutive correct answers; failure on 2 wrong answers. The width of the break of the smallest circle successfully identified was scored for 9 points on the temporal periphery of each eye. The sum of the scores for 14 30[degree] and 60[degree] points was the total score, its reciprocal being used for % calculations. One hundred subjects, selected at random, were tested. The reciprocal of their avg. score was designated 100%. The lowest score was 43% and the highest 364%. Eighty-three [male][male] scored 102%; thirteen [female][female] 91%. Eight color-blind [male][male] scored 92%. Declination with age was not observed. Correlation with central vision was positive at 0.38. Peripheral visual acuity was concluded to be an independent visual function. The weaker the acuity at any one point, the greater was the variability. The test showed a 0.91 reliability. Retesting of 20 subjects revealed 16% improvement. Indications were that peripheral visual acuity could be trained by practice.