Links
Here are some links to have more information about laser eye surgery...
https://en.wikipedia.org/wiki/Keratoconus
www.improveeeyesightq.com/Dangers-of-lasik.html
www.reviewofophthalmology.com/content/d/refractive_surgery/i/1352/c/25840/
www.gatinel.com/recherche-formation/diffraction/rainbow-glare-symptoms-causes-treatment/
www.lasikdisaster.com/starbursting.htm
https://www.youtube.com/watch?v=vd-xm32xIHY
https://www.lasikcomplications.com/tiger-woods.htm
...and these links are to have more information about stem cells.