Alpins N, Stamatelatos G (April 2007). "Custom-made photoastigmatic refractive keratectomy working with blended topographic and refractive facts 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 such as the obvious entrance surface https://wekurehealth.com/best-lasik-eye-surgery-in-delhi-ncr/