Abstract :
Background: Astigmatism is a common postoperative complication of cataract surgery, significantly affecting visual outcomes. In Manual Small Incision Cataract Surgery (MSICS), the incision type critically influences surgically induced astigmatism (SIA). Frown and chevron incisions, with their distinct geometries within the astigmatic funnel, are commonly used to reduce SIA. Comparing outcomes from these incisions aims to guide surgical technique selection and enhance postoperative visual performance after MSICS.Aim and Objectives: To compare surgically induced astigmatism following frown versus chevron incisions in Manual Small Incision Cataract Surgery (MSICS).Materials and Methods: Ninety patients within age group 41-80 with cataract were randomly assigned to either the frown incision group or the chevron incision group. Preoperative assessments included detailed ocular history, visual acuity, intraocular pressure, and keratometry. All surgeries were performed by a single surgeon under standardized conditions. Postoperative evaluations included keratometry, UCVA, and BCVA on day 30. SIA was calculated using keratometric readings pre- and post-operatively.Results: The chevron incision group demonstrated significantly less surgically induced astigmatism (mean SIA: 0.38 ± 0.141) compared to the frown incision group (mean SIA: 0.82 ± 0.319). Additionally, the chevron incision group showed similar visual acuity outcomes in terms of UCVA and BCVA compared to the frown incision group.Conclusion: Chevron incisions in MSICS result in significantly less surgically induced astigmatism and similar visual acuity outcomes compared to frown incisions. Hence suggests that chevron incisions may be preferable for optimizing postoperative visual outcomes in patients undergoing MSICS.
Keyword :
Surgically induced astigmatism, Frown incision, Chevron incision, MSICS, Keratometry.