. Annual and analytical cyclopaedia of practical medicine . ^^\yss Congeuital cataract with riders. (Skkel.) rected, if possible, toward any existingcause. A third form, although separated intoquite a series of groupings, consists oflocalizations in various parts of the stripes extending from pole topole, and often combined with the cen- tral and the zonular forms, are knownunder the name of spindle-shaped^ orfusiform cataract. Minute dots, usu-ally mostly situated in the central por-tion of the lens, and frequently groupedin the anterior cortex, are known aspunctate cataract. Smal
. Annual and analytical cyclopaedia of practical medicine . ^^\yss Congeuital cataract with riders. (Skkel.) rected, if possible, toward any existingcause. A third form, although separated intoquite a series of groupings, consists oflocalizations in various parts of the stripes extending from pole topole, and often combined with the cen- tral and the zonular forms, are knownunder the name of spindle-shaped^ orfusiform cataract. Minute dots, usu-ally mostly situated in the central por-tion of the lens, and frequently groupedin the anterior cortex, are known aspunctate cataract. Small spheroidalopacities in the nucleus, of congenitaltype, have, by some, been described ascentral cataract. As a rule, they are allmere concomitants of gross intra-ocularpathological change. Zonular opacities situated between thenucleus and the cortex of the lens, bothof these portions being transparent, arenot uncommon. At times they mayprogress as a series of minute opaque. Congenital, nuclear, and perinuclear cataract. processes, or riders, as they are termed,rendering the entire lens opaque. Thisvariety of cataract, also known as ^oeri-nuclear or lamellar, is either congenitalor forms during infancy in rachitic sub-jects or those who have been affectedwith convulsions. Usually it is binocu-lar, but it may occur in but one eye, andalmost without exception is but veryslowly progressive, though cases in whichthe opacity has become total have beenreported. Upon account of the situa-tion of the main opacity or opacities,vision is usually markedly disturbed,necessitating either artificial mydriasis,iridectomy, or lens-removal. If the appearance of the lens shows CATARACT. SYMPTOMS. 85 that the opacity is probably stationary,and if the zone of the opacity be notso broad that, after the pupil has beendilated with a mydriatic, vision is bet-tered, it is advisable to expose a portionof the transparent periphery of the lensby an iridectomy, thus obtaining aneccen
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