This refractive error is by all means operable. A qualifying examination is a basis of every laser vision correction. During the examination multiple tests are performed in order to determine any medical contraindications and the most suitable method of correction. In order to be qualified for the surgery you have to have a medical statement from your endocrinologist about the progress of your disease and that there are no medical contraindications for the surgery, that the hormones are indeed stable and that you are under constant medical supervision. The diseases you mention are connected with substantially elongated period of healing.