Alpins N, Stamatelatos G (April 2007). "Custom Made photoastigmatic refractive keratectomy working with mixed topographic and refractive details for myopia and astigmatism in eyes with forme fruste and gentle keratoconus". Rays of light can bend if they go through h2o or even a cornea like the crystal clear entrance surface https://wekurehealth.com/blog/how-lasik-eye-surgery-in-mumbai-can-transform-your-life/