ANALYSIS OF CORNEAL TRANSPLANTATION .2. POST-OPERATIVE ASTIGMATISM

  • 1 January 1979
    • journal article
    • research article
    • Vol. 11  (4) , 669-672
Abstract
An analysis of 153 penetrating keratoplasties was undertaken. The same surgical technique was used in all cases. Three factors had a statistically significant effect on postoperative astigmatism, as measured by keratometry. Astigmatism decreased with increasing follow-up time (P < 0.05). Vitreous loss at the time of the keratoplasty increased the amount of postoperative astigmatism (P < 0.05). Females had more postoperative astigmatism than males (P < 0.05), but this was probably related to a tendency for females to have a greater incidence of post-operative anterior synechiae (P just > 0.05), and the fact that all 6 cases of vitreous loss were in females. There was an almost significant trend toward postoperative anterior synechiae being associated with increased astigmatism (P just > 0.05), and there was also a trend toward the division of these synechiae reducing the amount of astigmatism. Fifteen of the 153 penetrating frafts were done in cases of herpes simplex. These were compared with 11 lamellar grafts done for herpes simplex, and there was a statistically insignificant trend toward more postoperative astigmatism in penetrating grafts.

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