In general, in the early period after LASIK it is preferable to use preservative free artificial tears, since sometimes these eyedrops may be used quite often and it would be preferable to minimise possible irritation from preservatives.
When the eyes have healed about 1 month after surgery, patients can generally use any appropriate over-the-counter (OTC) eyedrops, in the same way as other people who have not had eye surgery.
If you have any persistent issues with your eye or vision after surgery, do consult your doctor for advice about appropriate eyedrops to use for your eye in particular.
