C3 R is a procedure to increase the strength of the cornea
by increasing corneal collagen
crosslinking by using riboflavin
and ultraviolet light. As with your case it will be associated with pain for 3-4 days following surgery. Blurring of vision will gradually improve as your corneal epithelium becomes stable and after which you can use contact lenses.
There is no need to avoid using laptops or reading, you can continue with your regular work.