I ordered colored contacts. what could be causing my left eye to be blurry on the sides as if they are too small & blocking my vision it's not dirty?

Corneal Ischemia: Fitting contact lenses is an art, and must be done by an ophthalmologist or optometrist. Cosmetic contact lenses are potentially dangerous and may cause permanent vision loss if they cause a corneal infection. If you have a cl prescription, you can match the numbers and order online, but without a fitting you are risking blindness only for cosmesis. The scariest thing about halloween is colored cl.

The contacts: If you normally have larger pupils, the colored contacts could certainly give the perception that your peripheral vision is blocked. A more serious problem could be poorly fitting lenses causing corneal swelling. All should be evaluated by an eye doctor if you are going to continue to wear them.