PTK gets rid of superficial irregular tissue from the cornea using an excimer laser. It is usually used for corneal scars, floor irregularities or recurrent erosions. The physician places eye drops in your eyes to numb them. Then a lid speculum is put inside the eyes to hold them open https://wekurehealth.com/blog/reasons-to-choose-the-best-lasik-eye-surgery-in-delhi-ncr/