My son that dives, age 24, needs corrective lenses. He doesn't tolerate contacts well at all on land, chances are that he will not do any better wearing them only when he dives would be a challenge. He doesn't get to dive often, but we are looking into a mask with corrective lenses.
I think contacts are alright if you wear them all the time anyway, wear disposable lenses and dispose of them soon after you finish diving. They can promote dangerous infections.