Grave's disease is an autoimmune condition associated with abnormalities of the thyroid gland. It can cause protrusion of the eyes, muscle disorders and dryness. It is important that you seek the care of an eyeMD to determine what ocular conditions you have due to Grave's.
While I don't see a direct contraindication to having LASIK if you have Graves Disease(a type of thyroid disease), if it is an advanced form of the disease and you have eye sypmtoms of significance then I would be careful. Your surgeon will be able to discuss this with you. I have performed LASIK on many patients with mild forms of thyroid disease and I have never seen a complication with these patients.