A small hydroid found aro und the world. It is usually innocuous, but in one small area of the northern Honshu island of Japan, and in a similar area on the opposite side of the Sea of Japan around Vladivostock, a sting causes severe systemic symptoms very similar to the Irukandji syndrome. Similar to Irukandji stings, Gonionemus stings occur in epidemics with more in some years than others. It has not caused a proven death, although some unproven deaths have been claimed in the past.... gonionemus
n. a special kind of diagnostic contact lens used for viewing the structures at the angle of the anterior chamber of the eye (in front of the iris). These structures, at the periphery of the cornea, are not accessible to direct viewing.... gonioscope
(trabeculotomy) n. a primary surgical procedure for treating congenital glaucoma (see buphthalmos). A fine knife is used to make an incision into the blocked *trabecular meshwork from within the eye, thus creating an opening through which the aqueous fluid can drain.... goniotomy
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