Topography of scleral emissaries and sclera-perforating blood vessels.
One hundred persons have been subjected to slit-lamp examination for scleral emissaries. The number registered per subject averaged 12.2. Such were most frequent superiorly at 12 o'clock and inferiorly at 6 o'clock, rarer nasally and the rarest temporally. The courses of the perforating blood vessels were equally often radial (30%), incyclo-directed (28%), and excylodirected (29%), whereas rarely parallel with the limbus corneae (10%), and even more rarely irregularly winding (3%). Episcleral pigmentation in relation to emissaries was most frequently observed superiorly and where the vessels ran radial and limbus-parallel courses, whereas rarely nasally and temporally and at excyclo-directed and winding courses.
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012168:Retinal Pigments / Q000032:analysis; D012590:Sclera / Q000033:anatomy & histology* / Q000098:blood supply
D012168:Retinal Pigments