- Visibility 247 Views
- Downloads 240 Downloads
- Permissions
- DOI 10.18231/j.ijceo.v.11.i.3.23
-
CrossMark
A comparative study on surgically induced astigmatism in frown vs. chevron incision in manual small incision cataract surgery
- Author Details:
-
Pratistha Rath
-
Mohan Ramkumar
-
Rubina Huda
-
Syed Ali Nasar Waris *
-
Nandhakumar Chinnaiyan
-
Thirupuraa V
-
Rajeshwari Muthuswamy
-
Deborah Rinita
Pratistha Rath
Mohan Ramkumar
Rubina Huda
Syed Ali Nasar Waris *
Nandhakumar Chinnaiyan
Thirupuraa V
Rajeshwari Muthuswamy
Deborah Rinita
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.
References
- Jaffe NS, Jaffe MS, Jaffe GF. Cataract surgery and its complications. 4th ed. St. Louis: Mosby; 1997. p. 673.
- Steinert RF. Cataract surgery: techniques, complications, and management. 3rd ed. Philadelphia: Elsevier Saunders; 2010. p. 292–
- Agarwal S, Agarwal A, Jacob S. Manual of ophthalmic surgery. 2nd ed. New Delhi: Jaypee Brothers Medical Publishers; 2012. p. 154–
- Davis G. The evolution of cataract surgery. Mo Med. 2016;113(1):58–62.
- Duke-Elder S. System of ophthalmology, volume 11: surgery of the eye. 1st ed. London: Henry Kimpton; 1969. p. 432–50.
- Hennig A. Manual small incision cataract surgery: practical step- by-step guide. 1st ed. London: Jaypee Brothers Medical Publishers;
- p. 89–104.
- Rathi M, Dabas R, Verma R, Rustagi IM, Mathur S, Dhania S. Comparison of surgically induced astigmatism in chevron, straight, and frown incisions in manual small-incision cataract surgery. Indian J Ophthalmol. 2022;70(11):3865–8.
- Patra R, Bhat VG, Mallireddy S. A comparative study of surgically induced astigmatism in various incisions in manual sutureless small- incision cataract surgery. J Med Sci Clin Res. 2017;5(12):31696–
- Rathi M, Soni D, Verma R, Sachdeva S, Phogat J. Surgically induced astigmatism in frown versus chevron incision in MSICS. Int J Med Ophthalmol. 2020;2(2):95–7.
- Chandra N, Bhardwaj U, Tiwary R. Astigmatism correction following various incisions in manual small incision in the management of cataract surgery. Int J Pharm Clin Res. 2021;13(3):231–6.
- Choudhary R, Choudhary U, Sawhney AS. Comparison of surgically induced astigmatism l-shaped vs straight incisions in manual small incision cataract surgery. Ophthalmol Indonesiana. 2022;48(1):32–40.
- Archana S, Khurana AK, Chawla U. A comparative study of sclero- corneal and clear corneal tunnel incision in manual small-incision cataract surgery. Nepal J Ophthalmol. 2011;3(1):19–22.
- Venkatesh R, Chang DF, Muralikrishnan R, Hemal K, Gogate P, Sengupta S. Manual small-incision cataract surgery: a review. Asia Pac J Ophthalmol (Phila). 2012;1(2):113–9.
- Amesbury EC, Miller KM. Correction of astigmatism at the time of cataract surgery. Curr Opin Ophthalmol. 2009;20(1):19–24.
- Kongsap P. Visual outcome of manual small-incision cataract surgery: comparison of modified Blumenthal and Ruit techniques. Int J Ophthalmol. 2011;4(1):62–5.