Donna,

With all do respect, vision therapist opthamologists will prescribe new lenses (or should if they are any good). As a matter of fact, that should be the first thing the therapist tests when he/she see's you. There has even been some research done on prism and tinted glasses for people with mtbi. As Mark put it, it can go a long way to calming down the brain and reducing fatigue and in some cases promote healing because the brain is not stressed. Even people with mild TBI can benefit from this.