24 (7-year and 8-year surveys) have persisted. In comparison with the Greulich and Pyle standards, the skeletal development of Marshallese children was retarded at the same chronological agelevels. In addition, the exposed children were less mature than control children. The retardation was most prominent amongthose exposed during infancy to the fallout radiation (see Figure 18). Skeletal age values during successive examinationsof this particular group of children are shown in Table 15. These data covering the period since 1958 are being published in detail elsewhere.'* Complete tables of anthropometric measurements on the Marshallese children dating back to the early surveys are presented in Appendices |1 through 16. Ophthaimological Findings Ophthalmological examinations werecarried out in 1964 on 68 exposed, 45 children of exposed, and 190 people in the comparison population; a total of 303 people. Figure 18. Brothers. Marked retardation in statural growth is shown by the older (shorter) brother (No. 3, on the right) who was exposed at age [8 months. The younger by 21 months (No. 83, on theleft) is caller by 13 cm. The retarded boy shows no evidence of hyperthyroidism or skeletal disease clinically, other than markedly delayed osseous maturaucn. As noted in previous surveys, there was an increased incidence of large corneas and enlarged tortuous retinal vessels and a lower incidence of myopia, strabismus, amblyopia ex anopsia,retinitis pigmentosa, retinoblastoma, and congenital glaucoma. The incidence of arcus senilis is higher in the Marshallese than in similar age groups in the United States, which is in keeping with the gen- Table 15 Skeletal Age Developmentin Children Born Between July 1952 and February 1953 Skeletal age (S.A.) values at successive examinations, years Subject No. Sex Age at exposure, months 2 3 3 6 65 33 M M M M F F 16 17 16 16 15 20 3% 2% 3h 3 2% 5 44 2% 3% 5% 3% 6% 54 M 12 3% NE 955 962 980 996 814 F F F F M c* Cc Cc Cc Cc C.A.* = 4 yr C.A.=6 yr C.A.=8 yr 6 3 3% 6% 6 9% 7% 3 3% 8% 6% 10 8% 3 NE* 9 8 NE 94 10 il NE NE NE NE NE NE NE 6% NE 5% *C.A. = chronological age; NE =not examined; C =not exposed (control). 10 7% 8% 8% 8 C.A=9 yr 10 7% NE 10 9 C.A.= 10 vr 1054 al4 NE 10% 10