I'm 5 months post. Vestibular therapy has been very difficult, esp convergence problems. My left eye is not moving as quickly as my right and reading had been torture. I finally went back to my opthalmologist, as she'd given me a full exam a week prior to the concussion. She has set me up with a prism lens. I won't have them until mid-Jan so I'll post back. All I know is for the time I was looking at your with the prism, my vision felt finally normal.