Alpins N, Stamatelatos G (April 2007). "Custom-made photoastigmatic refractive keratectomy working with merged topographic and refractive data for myopia and astigmatism in eyes with forme fruste and gentle keratoconus". Rays of light can bend if they pass through drinking water or even a cornea including the very clear front surface https://wekurehealth.com/blog/lasik-and-cataract-surgery-solutions-in-gurgaon/