only one of which resulted in a severe visual handicap. The latter individual "sneaked" a view over his left shoulder at the time of the detonation resulting in a reduction of 20/20 vision to 20/100 in his left eye. It did not improve with time. His right eye apparently was shielded by his nose and retained its 20/20 visual acuity?24-, (Values such as 20/100 represent the ability of the eye to read standard letters and characters at 20 feet that a normal eye could read at 100 feet. 20/400 is generally interpreted as legal blindness.) Two military personnel at Johnston Island participating in the high altitude tests in 1962 also received eye injury. Immediately after the exposure, the visual acuity of both eyes of one man dropped to 20/400 for the area of retinal injury and 20/100 when looking away from this area. This man's visual acuity recovered to 20/30 in one eye and 20/40 in the other about one month later, and to 20/25 in both eyes about a year afterwards in the area of retinal damage. The other man's visual acuity followed a similar pattern starting at 20/400 in both eyes in the area of retinal damage and 20/60 looking away from this area, recovering to 20/50 and 20/80 in a month, and one year later was 20/40 in one eye and 20/60 in the other in the area of retinal damage. . (Experimental rabbits were exposed under nighttime conditions to the high altitude shot on August 1, 1958. Lesions with diameters of about 500 microns were observed out to 345 miles - the farthest distance at which rabbits were exposed. 31. Although there are differences