Question

Hank has just been informed that he is a diabetic. as a knowledgeable physician, he realizes that his risk for developing ____ has also increased.​

Answer 1

 he realizes that his risk for developing Retinopathy has also increased
Retinopathy is a medical condition which cause damage to one's retina and affect his/her sensitivity to light.
For a diabetic, a chance to develop this condition is higher because diabetes could contribute in adding the damage to the Blood vessels near the retina.