Yes I've experienced these things as well as many other visual disturbances as a result of the concussion I sustained.

About two years after the concussion I found an Optometrist who provides very thorough eye exams and vision therapy which I believed helped my vision to improve a great deal. Eowyn has posted about such therapy in one of the stickies at the top of the forum - that's how I was introduced to it.

Also, the concussion I sustained caused me to have pituitary dysfunction, also called neuroendocrine dysfunction, so after I started taking hormones to counter that dysfunction my vision improved as well.