I had lasik done 12 years ago, then had to have retinal surgery. can i have lasik again to correct my sight.

Maybe: Depends on how thin your cornea is. Prk may be a better option.

It depends: It depends on several factors including how much corneal tissue remains after the initial lasik procedure. After 12 years, the lasik flap should not be lifted. If anything more can be done, it would need to be advanced surface ablation (prk) type of laser vision correction surgery. You need to contact an experienced laser vision surgeon for a full consultation.

Depends on cornea: There is a possibility that there is enough corneal stroma for another lasik surgery. On the other hand, you may find out about refractive clear lens exchange which may offer additional advantages over lasik. Sometimes the two can be combined to give you functional vision without glasses. Best to go to a reputable refractive surgeon and be evaluated. Make sure you get a retinal evaluation.

LASIK and retina: People have LASIK because they are significantly near sighted. Near sighted patients are more likely to have retinal issues anyway. Probably a good idea to have retinas checked for any treatable pathology before additional refractive procedures like LASIK generally.