13. Eye Infections
You can identify the cause of blurred vision by examining the accompanying symptoms.
It is possible that blurred vision, along with red and irritated eyelids (and sometimes sinus irritation), can be an indication of an infection in the Eyes. This infection was likely spread by direct contact.
Untreated eye infections can cause discharge from the eyes, red eyes, and swelling. This could result in the infection spreading elsewhere on the body or even causing permanent sight loss.
See your doctor immediately if you suspect you may have an eye infection.