25 eral observation that the. Marshallese agefaster than Americans. The incidence was higher in the exposed group (36%) than in the unexposed group The incidence of pinguecula and pterygium is high in the Marshall Islands, and also slightly higher in the exposed group than in the unexposed did not show anysignificant differences between higher incidence in the exposed group maybe related to contamination of the conjunctival sac with fallout material at the time of the accident. The incidence of abnormalities of the crystalline lens is greater in the Marshall Islanders than in similar age groups in the United States. Further- (19%). However, recent analysis of aging criteria exposed and unexposed groups. Though diabetes mellitus has a moderately high incidence in the Marshall Islanders, only one case of diabetic retinopathy was noted. Thisis in keeping with the observationthatthe onset of diabetesin the Marshallese occurs largely in older individuals. (see Table 16). It has been postulated that the more, the incidence of such abnormalities was Table 16 Ophthalmological Survey, 1964 Exposed No. % Number examined 63 Anisocoria Anterior staphyloma Arcussenilis Argyll Robertson pupil Chalazion Choroiditis (old, healed with scars) Conjunctivitis Corneal pigment l 1 25 1 1.40 1.40 36.70 1.40 3 1 2 4.20 1.40 2.80 1 1.40 Corneal scar Opacities & cataract: presenile Aphakia Leprosy, eye signs of Macular degeneration Molluscum contagiosum Melanomaofiris Melanomaof conjunctiva Nystagmus Pinguecula Pterygium Phthisis bulbi Positive Rhomberg Retinal arteriosclerosis Retinal scars Retinal hemorrhage Strabismus: Internal External Seventh nerve weakness Vitreous opacities 590008 % 190 19.46 2 3 1.05 1.57 4,20 2 1.05 18 26.50 1 41 0.52 21.57 12 17.60 25 10.64 l 1.40 1 0.52 1 1.40 3 2.80 1 1.40 1 1.40 11 16.20 20 Proptosis 45 No. 37 2 . Yo 0.52 1 senile No. Controls 1 3 Driisen Duane’s syndrome Lens: Polychromatic sheen Children of exposed 2 1 2 2 17 29.40 1 4 2 1 1.40 6.00 2.80 1.40 5 7.30 1.05 0.52 1.05 1.05 8.44 19.98 1 0.52 1 2 0.52 1.05 1 9 5 2.2 0.52 38 1 1 1.57 1 3 0.52 0.52 4.68 2.60 0.52 1.57