On 2015 Jul 18, Jan Tunér commented:

A problem with most studies trying to treat tinnitus with laser light is the lack of proper diagnosis of the patients. Quite a few of these have a somatosensory background (the problem is basicly muscluar). Irradiation into the ear will then have no effect.

References: Bjorne A, Agerberg G. Reduction in sick leave and costs to society of patients with Ménière´s disease after treatment of temporomandibular and cervical spine disorders: A controlled 6-year cost-benefit study. Cranio. 2003; 21 (2): 136-143. Bernhardt O, Gesch D, Schwahn C, Bitter K et al. Signs of temporomandibular disorders in tinnitus patients and in a population-based group of volunteers: results of the Study of Health in Pomerania. J Oral Rehabil. 2004; 31 (4): 311-319. Levine RA, Abel M, Cheng H. CNS somatosensory-auditory interactions elicit or modulate tinnitus. Exp Brain Res. 2003; 153 (4): 643-648. Tullberg M, Ernberg M. Long-term effect on tinnitus by treatment of temporomandibular disorders: a two-year follow-up by questionnaire. Acta Odontol Scand. 2006; 64 (2): 89- 96.

On 2015 Jul 18, Jan Tunér commented:

A problem with most studies trying to treat tinnitus with laser light is the lack of proper diagnosis of the patients. Quite a few of these have a somatosensory background (the problem is basicly muscluar). Irradiation into the ear will then have no effect.

References: Bjorne A, Agerberg G. Reduction in sick leave and costs to society of patients with Ménière´s disease after treatment of temporomandibular and cervical spine disorders: A controlled 6-year cost-benefit study. Cranio. 2003; 21 (2): 136-143. Bernhardt O, Gesch D, Schwahn C, Bitter K et al. Signs of temporomandibular disorders in tinnitus patients and in a population-based group of volunteers: results of the Study of Health in Pomerania. J Oral Rehabil. 2004; 31 (4): 311-319. Levine RA, Abel M, Cheng H. CNS somatosensory-auditory interactions elicit or modulate tinnitus. Exp Brain Res. 2003; 153 (4): 643-648. Tullberg M, Ernberg M. Long-term effect on tinnitus by treatment of temporomandibular disorders: a two-year follow-up by questionnaire. Acta Odontol Scand. 2006; 64 (2): 89- 96.