IJMABHR International Journal of Medical and All Body Health ResearchIJMABHR 2582-8940 Anfo Publication House 389 10.54660/IJMBHR.2025.6.3.235-241 Evaluation of the effect of pterygium size on corneal astigmatism before and after excision ParrayAbuzar SumanNupur ChaturvediPushpalata SaxenaRuchi Jyostna KumarAbhishek Department of Ophthalmology, Saraswathi Institute of Medical Science, Hapur, Uttar Pradesh, India Head of Department, Department of Ophthalmology, Saraswathi Institute of Medical Science, Hapur, Uttar Pradesh, India Associate Professor, Department of Ophthalmology, Saraswathi Institute of Medical Science, Hapur, Uttar Pradesh, India Assistant Professor, Department of Ophthalmology, Saraswathi Institute of Medical Science, Hapur, Uttar Pradesh, India 25082025 6 3 235 241 10072025 11082025 CC BY-NC-SA 4.0

Pterygium is a common ocular surface disorder characterized by fibrovascular tissue growth from the conjunctiva onto the cornea, frequently causing corneal astigmatism that can significantly impact visual acuity and quality of life. This prospective study aimed to evaluate the relationship between pterygium size and the degree of corneal astigmatism before and after surgical excision, and to assess the visual outcomes following pterygium removal. A total of 180 patients with primary pterygium were enrolled and categorized into three groups based on pterygium size: small (n=60, 4mm from limbus). All patients underwent comprehensive ophthalmic examination including corneal topography, keratometry, and visual acuity assessment before and at 1, 3, and 6 months after pterygium excision with conjunctival autograft transplantation. Preoperatively, corneal astigmatism increased significantly with pterygium size, with mean values of 1.2±0.4 D, 2.8±0.7 D, and 4.6±1.2 D for small, medium, and large pterygia, respectively (p

 PterygiumCorneal AstigmatismKeratometryCorneal TopographyPterygium ExcisionConjunctival AutograftVisual AcuityCorneal Curvature References Liu L, Wu J, Geng J, Yuan Z, Huang D. Geographical prevalence and risk factors for pterygium: a systematic review and meta -analysis. BMJ Open. 2013;3(11):e003787. Coroneo MT, Di Girolamo N, Wakefield D. The pathogenesis of pterygia. Curr Opin Ophthalmol. 1999;10(4):282-8. Chui J, Coroneo MT, Tat LT, Crouch R, Wakefield D, Di Girolamo N. Ophthalmic pterygium: a stem cell disorder with premalignant features. Am J Pathol. 2011;178(2):817-27. Maheshwari S. Effect of pterygium excision on pterygium induced astigmatism. Indian J Ophthalmol. 2003;51(2):187-8. Tomidokoro A, Miyata K, Sakaguchi Y, Samejima T, Tokunaga T, Oshika T. Effects of pterygium on corneal spherical power and astigmatism. Ophthalmology. 2000;107(8):1568-71. Stern GA, Lin A. Effect of pterygium excision on induced corneal topographic abnormalities. Cornea. 1998;17(1):23-7. Walland MJ, Stevens JD, Steele AD. The effect of recurrent pterygium on corneal topography. Cornea. 1994;13(6):463-7. Bahar I, Loya N, Weinberger D, Avisar R. Effect of pterygium surgery on corneal topography: a prospective study. Cornea. 2004;23(2):113-7. Yagmur M, Ozcan AA, Sari S, Ersoz TR. Visual acuity and corneal topographic changes related with pterygium surgery. J Refract Surg. 2005;21(2):166-70. Avisar R, Loya N, Yassur Y, Weinberger D. Pterygium-induced corneal astigmatism. Isr Med Assoc J. 2000;2(1):14-5. Oldenburg JB, Garbus J, McDonnell JM, McDonnell PJ. Conjunctival pterygia. Mechanism of corneal topographic changes. Cornea. 1990;9(3):200-4. Tan DT, Chee SP, Dear KB, Lim AS. Effect of pterygium morphology on pterygium recurrence in a controlled trial comparing conjunctival autografting with bare sclera excision. Arch Ophthalmol. 1997;115(10):1235-40. Prabhasawat P, Barton K, Burkett G, Tseng SC. Comparison of conjunctival autografts, amniotic membrane grafts, and primary closure for pterygium excision. Ophthalmology. 1997;104(6):974-85. Kenyon KR, Wagoner MD, Hettinger ME. Conjunctival autograft transplantation for advanced and recurrent pterygium. Ophthalmology. 1985;92(11):1461-70. Kheirkhah A, Hashemi H, Adelpour M, Nikdel M, Rajabi MB, Behrouz MJ. Randomized trial of pterygium surgery with mitomycin C application using conjunctival autograft versus conjunctival-limbal autograft. Ophthalmology. 2012;119(2):227-32. Hirst LW. The treatment of pterygium. Surv Ophthalmol. 2003;48(2):145-80. Hansen A, Norn M. Astigmatism and surface phenomena in pterygium. Acta Ophthalmol (Copenh). 1980;58(2):174-81. Yanyali A, Talu H, Alp B, Karabas L. Corneal topographic changes after pterygium excision with conjunctival autograft. Ophthalmic Surg Lasers. 2001;32(6):445-50. Ozdemir M, Cinal A. Early and late effects of pterygium surgery on corneal topography. Ophthalmic Surg Lasers Imaging. 2005;36(6):451-6. Fong KS, Balakrishnan V, Chionh SB, Htoon HM, Chia A, Kredel L, et al. Refractive change following pterygium surgery: the PETRA study. Eye (Lond). 2014;28(11):1288-94. Teo CHY, Riau AK, Mosadeghi P, Lwin NC, Angunawela RI, Yam GHF, et al. Corneal matrix changes following pterygium excision surgery: a prospective study. Invest Ophthalmol Vis Sci. 2016;57(12):5004-12. Lin A, Stern GA. Correlation between pterygium size and induced corneal astigmatism. Cornea. 1998;17(1):28-30. Tan DT, Lim AS, Goh HS, Smith DR. Abnormal expression of the p53 tumor suppressor gene in the conjunctiva of patients with pterygium. Am J Ophthalmol. 1997;123(3):404-5. Montalban R, Pinero DP, Javaloy J, Alio JL. Correlation between corneal astigmatism and pterygium surface area. Cornea. 2013;32(11):1453-8. Young RD, Liskova P, Pinali C, Palka BP, Palos M, Jirsova K, et al. Large proteoglycan complexes and disturbed collagen architecture in the corneal extracellular matrix of mucopolysaccharidosis type VII (Sly syndrome). Invest Ophthalmol Vis Sci. 2011;52(9):6720-8. Errais K, Bouthour W, Ouertani A. Effect of pterygium surgery on corneal topography and corneal astigmatism. Eur J Ophthalmol. 2008;18(2):177-81. Maheshwari S. Pterygium-induced corneal refractive changes. Indian J Ophthalmol. 2007;55(5):383-6.