Intestinal surgery can result in your body becoming unable to properly absorb vitamin A.
This can lead to eye problems that can start many years after the surgery. Vitamin A deficiency can result in dry eye, softening of the cornea, damage to the retina, and night blindness.
The link was discovered when the records of four patients with ocular problems were reviewed. One patient developed symptoms within months of gastric bypass surgery, but the other three did not experience any symptoms until at least 18 years after surgery.
Their complaints included night blindness, decreased vision in one eye, and decreased vision in both eyes. Lab tests confirmed vitamin A deficiency in all four cases.
There have also been other reports that a number of patients have experienced severe visual complications, including blindness, following gastric bypass surgery.