Minimal astigmatism after sutureless planned extracapsular cataract extraction

Department of Ophthalmology, Tel Aviv University, Tell Afif, Tel Aviv, Israel
Journal of Cataract and Refractive Surgery (Impact Factor: 2.72). 04/2002; 28(3):499-503. DOI: 10.1016/S0886-3350(01)01263-9
Source: PubMed


To evaluate astigmatism after mini-nuc extracapsular cataract extraction (ECCE) in which a chevron incision is enlarged to 6.0 to 7.0 mm for easier nucleus removal and to compare the results with those using a 5.0 mm incision.
Department of Ophthalmology, The Edith Wolfson Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Holon, Israel.
Thirty eyes of 29 patients were enrolled in this study. Keratometry was performed preoperatively and 3 to 9 months postoperatively. The incision length was 6.0 mm in 6 eyes, 6.5 mm in 10 eyes, and 7.0 mm in 14 eyes that had mature cataract.
The mean induced astigmatism calculated by simple subtraction was 0.12 diopter (D) +/- 0.51 (SD), 0.16 +/- 0.98 D, and 0.67 +/- 0.91 D for the 6.0 mm, 6.5 mm, and 7.0 mm incision, respectively. By vector analysis, the mean induced astigmatism was 0.60 +/- 0.30 D, 0.75 +/- 0.67 D, and 1.36 +/- 0.77 D, respectively. Results by both methods showed no significant difference between the previously reported 5.0 mm incision and the 6.0 mm and 6.5 mm incisions. The 7.0 mm group had statistically significantly greater induced astigmatism than the 5.0 mm group (P =.01, simple subtraction; P =.002, vector analysis).
Enlarging the size of the chevron incision up to 7.0 mm resulted in a small increase in induced astigmatism. The enlarged incision simplified the operative technique.

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    • "Manual SICS is an alternative for phacoemulsification but the astigmatism is higher due to the larger size of incision. Burgansky et al have shown an increase in astigmatism with an increase in incision size (Burgansky et al, 2002). In their study by vector analysis, the mean induced astigmatism was 0.6 + 0.3 D for 6 mm incision, 0.75 + 0.67 D for a 6.5 mm incision and 1.36 + 0.77 D for a 7 mm incision. "
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