Correlation between keratometric and refractive astigmatism in pseudophakic eyes.
OBJECTIVE
To determine the correlation between refractive and keratometric astigmatism in pseudophakic eyes.


METHODS
Vissum Madrid, Madrid, Spain.


METHODS
Case series.


METHODS
Consecutive eyes that had phacoemulsification with intraocular lens implantation during the first quarter of 2003 were evaluated. The refractive and keratometric astigmatism were compared 2 months postoperatively.


RESULTS
The mean postoperative keratometric astigmatism (0.91 diopter [D] ± 0.67 [SD]) in the 121 eyes was statistically significantly higher than the mean postoperative refractive astigmatism (0.64 ± 0.72 D) (P<.0001). Regression analysis found a significant correlation between the refractive and keratometric errors of the J0 component (P<.001, r(2) = 0.29) and between the refractive and keratometric errors of the J45 component (P<.001, r(2) = 0.36)


CONCLUSIONS
Keratometric astigmatism was responsible for about 30% of the refractive astigmatism in pseudophakic eyes. Other undetermined factors induce astigmatism in these cases.
Teus
Miguel A
MA
Vissum Madrid, Madrid, Spain.
Arruabarrena
Carolina
C
Hernández-Verdejo
José L
JL
Sales-Sanz
Andrea
A
Sales-Sanz
Marco
M
D000368:Aged; D000369:Aged, 80 and over; D001251:Astigmatism / Q000503:physiopathology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D019591:Pseudophakia / Q000503:physiopathology*; D012029:Refraction, Ocular / Q000502:physiology*; D016037:Single-Blind Method