Pigment spots related to scleral emissaries in Eskimos, Mongols, and Caucasians.
Examinations of a series of 1241 subjects showed episcleral pigment spots bearing relation to scleral canal emissaries to be most frequent among Eskimos (prevalence 85%), somewhat less frequent among Mongols (68%), and the rarest among white Northern Europeans (16%). The prevalence is the highest among women and rises very little with increasing age. The pigmentation is most often bilateral in Eskimos (66%), more rarely so in Caucasians (18%). It is most often localized superiorly (54%). Then follows in decreasing order to frequency:inferiorly (26%), nasally (13%), and - significantly more rarely - temporally (7%). The pigmentation is most often related to an artery (90%), most often one running a radial course (39%) or in the incyclo-direction (32%). Its average length in caucasians is 1.1 mm. Pigmentations are significantly related to the colour of the iris (visible in 8% of blue irides, against in 40% of brown).
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D044466:Asian People; D002648:Child; D002675:Child, Preschool; D003718:Denmark; D005127:Eye Color; D005260:Female; D006116:Greenland; D006801:Humans; D007223:Infant; D004930:Inuit; D007564:Japan; D008297:Male; D008875:Middle Aged; D010858:Pigmentation; D012168:Retinal Pigments; D012590:Sclera / Q000098:blood supply / Q000294:innervation; D012737:Sex Factors; D044465:White People
D012168:Retinal Pigments