Figure 19. Section of skin from beta-burn area on backof Figure 17. Persisting depigmented areas, 6 months after exposure, in areas of mostsevere lesions.” neck of 56-year-old woman (No. 34) at 10 years after exposure (100 x). Note atrophy of epidermis with narrowing of stratum granulosum andfingerlike projections of rete pegs. Slight atrophy of the sweat gland ductsis also present.11 ac Seaweaneceaei eo Figure 18. Ear lesion healed, 6 months Figure 20. Pigmented nevusiike lesions in previous the neck regions that sustained severe beta burns and unexposed populations. [n addition, special have been enhanced by the skin exposure (see Fig- the eves have been doneat intervals by ophthal- after exposure, with considerable scarring.” suggests that the developmentofbenign lesions may ure 20). Possible cocarcinogenic factors such as the ultraviolet radiation in tropical sunlight and skin beta-burn area of neck (subject No. 78).1 examinationsfor possible effects of radiation on mologists accompanying the medical team,first in May 1954 (2 monthsafter the accident) and then irritation from coral, trauma, and infections may in 1955, 1956, 1957, 1958, 1959, 1962, 1964, 1967, skin more likely, but the dark pigmentation should offer some protection, as it has been shownthat testing of vision, accommodation, muscle balance, render the developmentof malignant changes in the skin canceris less prevalent among Negroes. £. OPHTHALMOLOGICAL FINDINGS Routine ophthalmological examinations (in- . cluding funduscopic) have been included in the regular ical examinations of both the exposed 500n120 1971, and 1972. The routine examinations include and pupillary reactions; external examination; and funduscopy.Vision is tested with the Snellen chart and the E-chart when necessary. Intraocular tension has been measured when indicated, and color vision has been tested on several occasions. Special examinations have includedslit-lamp and fundus photography.Aspart of the aging studies quantitative changes in certain eye characteristics