I have a blurry spot in my vision. It's a constant spot and doesn't change positions. What could it be?

Retina? A small fixed blurry spot in the vision usually represents a macular problem in the retina. Sometimes, this is just a benign process but it's a good idea to get it checked out. There can be swelling like in serous chorioretinopathy or an early macular hole. See your ophthalmologist soon.
Scotoma. Many things could cause this from cornea to cataract of lens to edema, pseud-hole, epitetina membrane , and other causes of retina disease and optic nerve problems. You should see an ophthalmologist as soon as posiivle after you read this note. Sooner the better.