Jain, A. K., and D. J. Pandey. “Evaluation of Change in Pterygium Induced Keratometric Astigmatism in Patients Following Pterygium Excision With Autologous Graft Surgery”. Nepalese Journal of Ophthalmology, vol. 12, no. 2, Oct. 2020, pp. 191-00, doi:10.3126/nepjoph.v12i2.28287.