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KMID : 0360220140550101470
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Journal of the Korean Ophthalmological Society
2014 Volume.55 No. 10 p.1470 ~ p.1475
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The Comparison of Astigmatic Outcomes after Cataract Surgery of Inferior versus Superior Clear Corneal Incision
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Na Jong-Kyoung
Kim Man-Soo
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Abstract
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Purpose: To analyze the difference in astigmatism and the mean change in total astigmatism between inferior clear corneal incision and superior clear corneal incision following cataract surgery in surgically-induced astigmatism (SIA).
Methods: Fifty-five eyes of 55 patients with with-the-rule astigmatism >0.5 diopters were evaluated. Patients were divided into two groups according to incision location (Group 1, 26 eyes with an inferior incision; Group 2, 29 eyes with a superior incision). Patients were evaluatied one month postoperatively. Uncorrected visual acuity (UCVA, log MAR), best-corrected visual acuity (BCVA, log MAR), SIA and mean change in corneal astigmatism were measured in both groups.
Results: One month postoperatively, mean UCVA was 0.15 ± 0.17 log MAR in Group 1 and 0.23 ± 0.24 log MAR in Group 2 (p = 0.253). Mean BCVA was 0.08 ± 0.13 and 0.08 ± 0.12 log MAR in Groups 1 and 2, respectively (p = 0.926). The SIA was 0.50 ± 0.17 diopter and 0.57 ± 0.34 diopter (p = 0.253) and mean change in total astigmatism was 0.50 ± 0.96 diopter and 0.38 ± 0.86 diopter in Groups 1 and 2, respectively (p = 0.426).
Conclusions: There was no statistically significant difference between the two groups. Thus, corneal incision on the inferior side in patients of with-the-rule astigmatism can reduce the SIA and mean change in corneal astigmatism for patients with glaucoma, hard upper eyelid tension or sunken eye.
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KEYWORD
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Cataract surgery, Corneal astigmatism, Inferior clear corneal incision, Superior clear corneal incision, Surgically-induced astigmatism
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