Hi,
It will depend on the patient's condition. Patients with diabetes may have fluctuating vision due to their inconsistent blood sugar level. However, if the patient's diabetes condition is under control, then it may be possible for one to undergo vision correction surgery. It will be wise for you to consult your endocrinologist/health professional regarding your condition.
Also, when choosing which procedure to go for, you can bear in mind that Advanced Surface Ablation (ASA) techniques (such as TransPRK and epiLASIK) will be more suitable for diabetic patients as compared to LASIK, due to the absence of cut flap.
If your diabetes is well-managed, then I will advise you to schedule a comprehensive eye evaluation with the eye surgeon of your choice.
Cheers,
Dr Tony Ho