Husband Had Cataract Surgery July 23 In Right Eye. There

Husband had cataract surgery July 23 in right eye. There is corneal swelling which is worse now than just after surgery. Dr prescribed steroid and saline ointment. Husband has blurriness in am but it clears up by pm. Other eye did well in surgery but still shows some swelling. Husband is 71 with Type 2 diabetes. No diabetes has shown up in eye. Well controlled with meds. I’m very concerned.Does this happen often?