Longitudinal study of postoperative astigmatism.
A prospective longitudinal study of 503 eyes that had extracapsular cataract extraction with posterior chamber intraocular lens implantation was conducted. Each patient was followed for a minimum of one year. Data were collected, analyzed, and the following information ascertained: temporal behavior of induced keratometric and cylindrical changes, induced with-the-rule, against-the-rule, and oblique astigmatism, comparison of keratometric and refractive astigmatism, and the effect of cutting sutures upon induced astigmatism. Though a large amount of with-the-rule astigmatism was immediately induced after surgery, by the end of one year over 60% of patients shifted toward against-the-rule.
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D001251:Astigmatism / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D002387:Cataract Extraction / Q000009:adverse effects* / Q000379:methods; D003315:Cornea / Q000473:pathology; D006801:Humans; D007910:Lenses, Intraocular / Q000009:adverse effects; D008137:Longitudinal Studies; D011446:Prospective Studies; D013536:Suture Techniques