Here is something on blurred vision too.
# Glucose is used by the body’s cells as an energy source and metabolic intermediate. Glucose is transported to the body from the intestines through the blood.
# Right after a meal your blood glucose level rises. About two hours after a meal, your blood glucose level decreases. If a person is affected by high blood sugar, he or she may become thirsty, hungry, experience blurred vision, frequent urination, lethargy and headache
hope I helped but if you dabble into slin be careful. One way to check if it's gh is stop for a week and see if it persist or goes away.
Make sure you take you gh in the morning upon rising not before bed. Taking before bed can cause negative feed back loops like test or anything else.
Your bodies gh is lowest first thing in the morning and highest 1 1/2 - 2 hrs after bed.