What is the leading cause of kidney failures?

Any laser refractive surgery, whether LASIK, PRK, or SMILE changes the corneal shape. Sometimes more, and sometimes less, depending on the amount of spectacle power that is to be corrected. There are a number of different types of contact lenses, but basically, you can differentiate them into soft versus hard/rigid, and corneal versus miniscleral/scleral. Any of these lenses can be safe to wear after laser refractive surgery, provided that they are properly fitted by a qualified optometrist/ophthalmologist.

Mercury is a toxic heavy metal which is widely dispersed in nature. Most human exposure results from fish consumption or dental amalgam. Human exposure to the vapour of metallic mercury dates back to antiquity but continues today in occupational settings and from dental amalgam. Health risks from methylmercury in edible tissues of fish have been the subject of several large epidemiological investigations and continue to be the subject of intense debate. Mercury is most notable for its neurological effects. Too much mercury can cause numbness, memory issues, anxiety, low mood, and tremors.