KERATONYXIS

(Lat.), n. f. Ke2r-a2t(a3t)-o(o3)-ni2x(nux)'i2s. Gen., -ny'xeos (-is). From K^pas, a horn, and vvis, a pricking. Fr., keratonyxis. Ger., K., Durchstechung der Hornhaut. An operation for the purpose of breaking up a soft cataract. A needle is introduced through the cornea, the capsule of the lens freely opened, and the substance of the lens then thoroughly broken up by stirring with the needle. This allows the aqueous humor to come in contact with the lens matter, which hastens its absorption. This operation should only be performed on the soft cataracts of childhood and youth. [F.] [s. 535]