Well, I'm just guessing here but...androgens can raise your blood pressure which might affect your eyesite. 1-AD also produces lethargy in the first 2 weeks which can affect your eyesite (you're tired). There may also be a blood sugar thing going on (are you eating enough?).
Or it could be a total coincidence due to something unrelated (getting enough rest?).
If you're concerned visit a doctor and get a blood test. You will be surprised how powerful 1-AD is and how it messes with your chemistry (your doctor probably won't like it, however). BP, lipid, renal and cholesterol levels will likely be askew. These are all "invisible" side effects of androgens.