24 (visual acuity, arcus senilis, accommodation,ret- has been found by others to be characteristic of people living on low coralatolls in the Pacific and 1. General Findings coral dust, salt water, and bright sunlight. The other majorfindings listed were related to general aging effects (loss of visual acuity, cataract forma- inal arteriosclerosis) have been recorded.3.15.32 Somegeneral observations on the eyes of the Marshallese have indicated differences from the eyes of U.S. Caucasians which may berelated to ethnic background andpossibly to environmental factors. The major eye findings for the past 5 years are listed in Table 14. The high incidence of pingueculae and pterygia is the most notable findinglisted in the table. This is thoughtto berelated to irritation of the eyes bv tion, loss of accommodation,loss of ocular muscle balance, etc.) and these appeared to occur to a lesser degree in the Marshallese than in Americans, althoughthe incidenceof arcus senilis and cataracts seemed higher. The Marshailese had less myopia, aberrations of color vision, and ambly- Table 14 Ophthalmological Findings, 1970-1974 Rongelap and Ailingnae exposed (70°) Ocular condition No. Anisocoria 1 Arcus senilis Argyll-Robertson pupil Chalazion L.4 22 1 3 31.5 1.4 4.3 Conjunctivitis 0 0 Driisen 0 0 Choroiditis Congenital defects 2 2 Corneal pigment Corneal scar 0 2 Enophthalmos Enucleation Glaucoma, primary Glaucoma, secondary Lens: Cataracts Lenticular opacities Polychromatic sheen Macular degeneration Nightvision impairment Nystagmus Phrhisis bulbi Pinguecuila ° Proptosis Pterygium Ptosis Retinal arteriosclerosis Retinal hemorrhages Retinal scars Retinopathy, diabetic Strabismus Uveids Vitreous opacities Xanthoma *Number of people examined . 3.0 3.0 (133*) No. 0 % 0 Uurik exposed (100*) No. 0 % 0 34 0 1 25.5 0 0.75 2! 0 0 21 0 0 2 * 1.50 0 0 2 0 1.50 0. 0 l 0 0 0 1.4 0 0 0 0 0 1 12 17.0 26 19.5 20 20 0 0 0 0 1 0: 0 0 13.0 10.0 3.0 1 l 1.4 1.4 2 0 1.5 0 0 0 1.4 0 0 0 10.0 l 17 2 11 1.4 24.0 3.0 15.7 1 41 0 19 0.75 31.0 0 14.0 0 29 0) 1 2 3.0 2 1.5 3 2 3.0 0 0 1 2 1 1.4 3.0 1.4 2 3.0 0 4.5 17 17 l 7 1 6 10.5 10.0 0.75 0 9 7 2 0 14 13 ! 1.50 0 0 0 0.75 0 1 1 0 0 bs) 2 0 3.75 1 0. 0 3.0 0 Positive Romberg 500b121 % Rongelap unexposed 0 7 0 0 1 0 1 0 0 0 7 17 1 0 0 7 0 0 29 0 1 0 3 0 0 2 2 0 1 0 0 0.75 0 0 1 0 0 1 0 2 15 3 3