“…The role of these factors in melanoma causation could usefully be examined in relation to the eye tumour where these might be less confounding than for the skin tumour by the factor(s) causing the secular increase in the latter. The cross-sectional age distribution of eye melanoma in Oxford is generally similar to that in the United States (Scotto et al, 1976), in aggregated data for England and Wales 1962-67 (OPCS, 1972) and1968-70 (OPCS, 1975), and in many other populations (Waterhouse et al, 1976;Hakulinen et al, 1978), with no peak of incidence evident in middle age. In several of the same populations such a peak exists in cross-sectional data for females with skin melanoma (OPCS, 1972;1975;Waterhouse et al, 1976;Magnus, 1977), especially skin melanoma of the lower limbs (Lee & Yongchaiyudha, 1971;Magnus, 1977;Holman et al, 1980;Houghton et al, 1980).…”