Presbyopia is also a refractive error but one that strikes most people after the age of 40. It means you have trouble focusing on things that are close up, like reading material. If you find you need to hold magazines, books, and menus farther away from your face in order to read them, presbyopia could be causing your blurry vision.
You caught conjunctivitis
Conjunctivitis or pink eye is usually caused by adenoviruses, pesky viruses that can cause the common cold, bronchitis, and sore throats. Although not usually serious, conjunctivitis can spread like wildfire in schools and other crowded venues. “Virus particles on surfaces can stay alive for about two weeks,” says Kim Le, MD, a pediatric ophthalmologist with the Henry Ford Health System in Detroit.
You sleep with your contacts in
Contact lenses can fix your vision without encumbering your face, but if you don’t use them properly, they can also cause sight-robbing infections.
Contact lenses move across the eye every time you blink, creating micro-scratches on the surface of your eye. Infection-causing microorganisms can get caught under the lens and get into the scratches.
You have an eye infection
You don’t have to wear contact lenses to get eye infections that damage the cornea.
Herpes keratitis is an infection in the eye caused by the herpes virus. You can get it just by touching a cold sore on your lips then touching your eyes. Bacteria and fungi that muscle their way in after an eye injury can also cause infection.
You have age-related macular degeneration
As you age, and especially after you pass 60, you have a higher risk of damage to the macula, an area near the center of the retina that helps you see details and objects directly in front of you. Age-related macular degeneration or AMD results in a loss of central vision, which can make everyday activities like driving and reading understandably challenging.
You're diabetic
If you have undiagnosed type 1 or type 2 diabetes, or diabetes that has been diagnosed but is uncontrolled, you’re at risk for diabetic retinopathy. This is when damaged blood vessels leak or extra blood vessels grow in the back of the eye and start bleeding.
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