As far as I am aware the risks of corrective eye surgery are not increased by having lupus. However, many lupus patients have dry eyes and this may affect the outcome of surgery. You should discuss the diagnosis and treatment carefully with your ophthalmologist.
Cataract surgery results in lupus patients is usually excellent. You should obviously tell your surgeon what drugs you are taking particularly if you are on anticoagulants. Otherwise this is a low risk procedure.