. Annual and analytical cyclopaedia of practical medicine . ch in itself isirregular, opaque, and thickened di-rectly beneath, the condition is knownas anterior pyramidal cataract: in real-ity an opacity in both the lens and itsanterior capsule. The disturbance invision depends upon the extent of thecapacity. Treatment, as a rule, is un-availing, except the possibility of anoptical iridectomy should the opacity belarge and the pupil small. When the opacity is situated at theopposite pole of the lens, the conditionis designated as posterior polar cataract,or posterior pyramidal cataract. In mos
. Annual and analytical cyclopaedia of practical medicine . ch in itself isirregular, opaque, and thickened di-rectly beneath, the condition is knownas anterior pyramidal cataract: in real-ity an opacity in both the lens and itsanterior capsule. The disturbance invision depends upon the extent of thecapacity. Treatment, as a rule, is un-availing, except the possibility of anoptical iridectomy should the opacity belarge and the pupil small. When the opacity is situated at theopposite pole of the lens, the conditionis designated as posterior polar cataract,or posterior pyramidal cataract. In mostinstances the latter form, which is nota true cataract, is congenital in type, andis due to some interference with the in-complete disappearance of the hyaloidartery. It is recosfnized as a small dot 84 CATARACT. SYMPTOMS. or point on the posterior capsule at theposterior pole of the lens, projectingbackward into the vitreous humor. Trueposterior polar cataract is, at times,found as the initial point of election ofihe senile form, and is not infrequently. - ?//»}?!• Posterior cortical rataraet. {^.>ir/id.) seen associated with uveal disorder as-sociated with lymph-stream disturbanceand liquefaction of the vitreous it appears in the stellar formof opacity. In this variety interferencewith vision depends not only iipon thesize of the opacity, but also upon con-comitant and relevant changes. Treat-ment, to be of any avail, must be di-
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