The Lasik laser procedure is performed many thousands of times each year. Risks are reported to be minimal and improvement in vision is said to be considerable. The physician performing the procedure will provide you with recommendations for activity following Lasik surgery. In general, it's suggested that you can return to all of your normal activities without disrupting the healing process in two weeks. However there is no specific data on when it's safe to return to diving, nor has there been any research on the effects of a mask squeeze and the negative pressure it can create on an eye that has had this procedure.
Considering the lack of specific data, in uncomplcated cases, a conservative recommendation would be to wait an extra two weeks to allow the eye extra healing time.