You should be able to see clearly and comfortably with contact lenses. When you're wearing contacts, things can start to look a little blurry. This may only be a minor annoyance, with objects appearing out-of-focus and hazy. To get a better view, you may find yourself constantly blinking, squinting, and rubbing your eyes.
A change in your prescription, deposits like dirt on the lens surface, dry eyes, allergies, infections, or other eye health problems too are possible causes of blurry vision while wearing contacts.
When you don't have the suitable prescription for your contact lenses, light rays do not focus on the retina, tends to result in blurry vision. A new prescription can fix this problem, but it could take a week or two for your body to adjust to the new prescription, during which time you may experience blurriness.
Dry eye is a condition that happens when the eyes are not properly moisturized. It could also be one of the reasons of your contacts becoming blurry. This can happen when there are not enough tears in the eyes or if they're of bad condition. It's quite common in contact lens wearers and can cause blurry vision as well as other symptoms like redness and stinging.
Conjunctivitis, also known as pink eye, is an eye infection that can cause symptoms such as blurred vision, watery eyes, redness, and pain. If you have any signs of infection, stop wearing your contacts and see your optometrist as soon as possible. You may be required to stop wearing your contact lenses for a period of time while the infection is being treated.