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a-stig-ma-tism: a refractive error of the eye in which parallel rays of light from an external source do not converge on a single focal point on the retina.
stig-ma: a mark of disgrace or infamy; a stain or reproach, as on one's reputation.
stig-ma-ta: a mental or physical mark that is characteristic of a defect or disease
re-vi-sion: alteration, correction, emendation.