Rana, Rachana Singh, et al. “Clinical Profile on Keratoconus Presenting at A Tertiary Eye Care Centre- Tilganga Institute of Ophthalmology”. Nepalese Journal of Ophthalmology, vol. 11, no. 2, Dec. 2019, pp. 138-44, doi:10.3126/nepjoph.v11i2.27818.