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F.-X. Brousseaud, B. Dufay Dupar, O. Laplace, R. Adam, O. Touzeau, T. Rodallec, J.-P. Nordman; Comparative Study of Induced Corneal Astigmatism After 2.2 Mm and 3.3 Mm Incisions in Coaxial Phacoemulsification Cataract Surgery. Invest. Ophthalmol. Vis. Sci. 2008;49(13):379. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To compare surgical induced astigmatism (SIA) after 2.2 mm and 3.0 mm supero-oblique clear corneal coaxial phacoemulsification (PKE) cataract incision.
All eyes having supero-oblique PKE cataract surgery using the right hand of a single surgeon were prospectively included. There were 49 eyes (25 right eyes and 24 left eyes) of 49 consecutive patients ( 20 PKE with 2.2 mm incision and 29 with 3 mm incision). Keratometry and BCVA were performed preoperatively and 1 month postoperatively (M1). A method of vector analysis was used for studying SIA.
Induced astigmatism at M1 was 0.35 diopter (D) in the 2.2 mm group and 0.26 D in the 3.0 mm group. Induced astigmatism was not statistically different between the two groups (Δx (p= 0.191) and Δy (p=0.411). There was no difference between right and left eyes in the 2.2 mm group (p= 0.269) and the 3.0 mm group (p= 0.102). BCVA was also not different between the two groups at M1(p= 0.266).
No difference was found between the 2 groups but, using graphical analysis, SIA seems to be more predictable with 2.2 mm incisions. Furthermore, making a supero-oblique clear corneal PKE incision does not induce different SIA between right and left eyes.
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