Please choose the correct ending to complete the given sentence: Health: [header] How to treat diabetic retinopathy [title] Find out how serious your diabetic retinopathy is. [step] There are four stages of diabetic retinopathy, with the first being the least severe and the fourth being the most severe. When you visit your optometrist, tell them that you have diabetes.

Ending1: They will discuss the risks, and give you injections that contain insulin. [title] Undergo chemical therapy for retinopathy. Ending2: [substeps] Since these are less severe than other types of retinopathy, your optometrist will ask you basic questions regarding the condition and how you feel about it. Let them know what your normal nervous system is like and what kind of problems you have. Ending3: They can perform a basic dilated eye exam. They may refer you to a more specialized eye doctor, an ophthalmologist, who can let you know how serious your condition is. Ending4: [title] Understand how retinopathy affects the eyes. [step] Optometriosis often causes photodivision, which means eyes can't focus properly.

Answer format: ending1/ending2/ending3/ending4