tastigmatism

[Gr. a, priv., and στιγματίζω ( stigmatizō ) = to prick, to puncture.] [STIGMA.] Med.: A defect in eyesight attended with dimne of vision, arising, it is believed, from a structural error or accidental malformation of the lens of the eye. If, in such cases, a luminous point be viewed by the eye, it will not appear like a point, but will put on some other appearance dependent on the nature of the error or malformation. "The cure of a troublesome affection of the tear ducts, together with astigmatism ."-Daily Telegraph, March 23, 1877.