Alpins N, Stamatelatos G (April 2007). "Custom-made Photoastigmatic refractive keratectomy making use of combined topographic and refractive data for myopia and astigmatism in eyes with forme fruste and delicate keratoconus". With age, the lens inside the eye gets less versatile, which often can make it more difficult to discover things https://wekurehealth.com/blog/cataracts-what-to-expect-and-how-to-prepare-wekure-health/