6. Allergies
An allergy can be to things in the environment like pollen (which tends to make it flare up during only certain times of the year or seasons), or it can be to ingredients, medications or foods: Allergies to wheat, certain nuts, shellfish and lactose are very common – although one can theoretically be allergic to anything, and become allergic to it at any point during your life.
Blurred vision is a common symptom that happens during most allergy attacks or episodes. Flushing of the skin, a rash, itching, fever, difficulty swallowing or breathing and an overproduction of phlegm are all symptoms that can go together with blurred vision and mean that you’re having an allergic reaction.
Sometimes allergic reactions are mild, but they can also be dangerous and have the potential to be fatal if medical attention isn’t reached in time. If you suspect that you have allergies, see an allergy specialist for screening and make sure that you always have the right medication to treat an allergy attack on hand.