The Short Answer Educational content only. Any suspected concussion warrants medical evaluation. Consult neuro-optometrist, vestibular-trained physical therapist, or concussion specialist for individualized guidance. Syntonic phototherapy uses selected wavelengths of light delivered through the eyes to address post-concussion visual dysfunction, autonomic nervous system regulation, and visual field constriction (Silverberg et al., 2020). Syntonics is emerging alternative therapy in neuro-optometry with limited but growing evidence base. Treatment involves 20-minute sessions viewing specific colored light targeting different clinical concerns: red-orange (alpha-omega) for parasympathetic activation, indigo-purple (mu-delta) for sympathetic activation, and blue-green (upsilon-omega) for balancing. Typically 15-20 sessions over several weeks. Available at specialized neuro-optometric clinics with syntonic training. Not first-line treatment but reasonable adjunct to vision therapy and other neuro-optometric rehabilitation. Evidence emerging but not yet definitive. Cost typically not covered by insurance. Syntonic phototherapy uses colored light. Uses colored light. Addresses autonomic nervous system and visual field. Autonomic nervous system and visual field. Emerging with limited evidence base. Emerging with limited evidence base. Syntonics History and Theory Developed by Dr. Harry Riley Spitler 1920s-1930s. Developed by Dr. Harry Riley Spitler 1920s-1930s. College of Syntonic Optometry founded 1933. College of Syntonic Optometry founded 1933. Light through eyes affects endocrine and nervous systems. Light through eyes affects endocrine and nervous systems. Retinohypothalamic pathway central. Retinohypothalamic pathway central. Suprachiasmatic nucleus involvement. Suprachiasmatic nucleus involvement. Autonomic nervous system modulation. Autonomic nervous system modulation. Endocrine effects proposed. Endocrine effects proposed. Syntonic Wavelengths and Effects Alpha-omega (red-orange) parasympathetic. Alpha-omega red-orange parasympathetic. Mu-delta (indigo-purple) sympathetic. Mu-delta indigo-purple sympathetic. Upsilon-omega (blue-green) balancing. Upsilon-omega blue-green balancing. Delta-N (indigo) alerting. Delta-N indigo alerting. Alpha-N (red) energizing. Alpha-N red energizing. Mu-upsilon (violet-green) balancing. Mu-upsilon violet-green balancing. Post-Concussion Applications Autonomic nervous system regulation. Autonomic nervous system regulation. Visual field constriction expansion. Visual field constriction expansion. Convergence insufficiency support. Convergence insufficiency support. Accommodative dysfunction support. Accommodative dysfunction support. Anxiety and stress reduction. Anxiety and stress reduction. Sleep improvement. Sleep improvement. Migraine reduction. Migraine reduction. Photophobia gradual desensitization. Photophobia gradual desensitization. Attention and focus improvement. Attention and focus improvement. Visual Field Constriction in Concussion Peripheral visual field constriction common. Peripheral visual field constriction common. Related to ambient vision dysfunction. Related to ambient vision dysfunction. Contributes to spatial disorientation. Contributes to spatial disorientation. Contributes to balance problems. Contributes to balance problems. Formal visual field testing may be normal. Formal visual field testing may be normal. Functional visual field constriction. Functional visual field constriction. Syntonics addresses functional constriction. Syntonics addresses functional constriction. Treatment Protocol Initial assessment identifies target frequency. Initial assessment identifies target frequency. Autonomic assessment. Autonomic assessment. Visual field assessment. Visual field assessment. Session length 15-25 minutes. Session length 15-25 minutes. Sessions 3-5 times per week. Sessions 3-5 times per week. Course 15-20 sessions typical. Course 15-20 sessions typical. Reassessment every 5 sessions. Reassessment every 5 sessions. What to Expect During Sessions Patient seated in darkened room. Patient seated in darkened room. Views syntonizer device with selected filter. Views syntonizer device with selected filter. Eyes open during session. Eyes open during session. Relaxation during session. Relaxation during session. Symptoms may fluctuate initially. Symptoms may fluctuate initially. Improvement typically over sessions. Improvement typically over sessions. Evidence Base Case series support. Case series support. Small trials support. Small trials support. Larger randomized trials lacking. Larger randomized trials lacking. Mechanism proposed but not fully elucidated. Mechanism proposed but not fully elucidated. Consensus statements do not include syntonics. Consensus statements do not include syntonics. Emerging complementary treatment. Emerging complementary treatment. Combined Treatment Approach Adjunct to vision therapy. Adjunct to vision therapy. Not replacement for vision therapy. Not replacement for vision therapy. Combined with vestibular rehabilitation. Combined with vestibular rehabilitation. Combined with cervical treatment. Combined with cervical treatment. Multidisciplinary approach. Multidisciplinary approach. Cost and Insurance Cost $100-$250 per session common. Cost $100-$250 per session common. Total course $1,500-$5,000. Total course $1,500-$5,000. Insurance rarely covers. Insurance rarely covers. Cash pay common. Cash pay common. FSA and HSA sometimes cover. FSA and HSA sometimes cover. Payment plans sometimes available. Payment plans sometimes available. Finding a Syntonic Practitioner College of Syntonic Optometry directory. College of Syntonic Optometry directory. Neuro-optometrist with syntonic training. Neuro-optometrist with syntonic training. Behavioral optometrist with syntonics. Behavioral optometrist with syntonics. Ask about concussion experience. Ask about concussion experience. Integration with vision therapy. Integration with vision therapy. Realistic Expectations Emerging therapy with limited evidence. Emerging therapy with limited evidence. Not first-line treatment. Not first-line treatment. Reasonable adjunct to standard care. Reasonable adjunct to standard care. Response variable between individuals. Response variable between individuals. Cost significant without insurance coverage. Cost significant without insurance coverage. Discussion with treating team essential. Discussion with treating team essential. Supporting Mobility Routine These exercises support neuro-optometric treatment through cervical mobility and nervous system regulation. JME 155 Diaphragmatic breathing supports vagal tone and parasympathetic regulation during concussion recovery. 10 breaths every 60-90 minutes. JME 14 Chin tucks reduce upper cervical tension common in concussion injury. 10 repetitions with 5-second holds. JME 1 Cervical rotation supports cerebral blood flow and nervous system regulation. 10 repetitions each direction. JME 150 Thoracic rotation restores breathing depth shallow during concussion recovery. 8 repetitions per direction. Start your 3-day free trial for joint-specific mobility programs that support nervous system regulation through concussion recovery. Is syntonic phototherapy evidence-based for concussion? Syntonic phototherapy has case series and small trials supporting use but lacks large randomized controlled trials. Consensus statements for concussion do not include syntonics. Emerging complementary treatment with growing but limited evidence base. Reasonable adjunct to standard neuro-optometric care. Not first-line treatment. Discussion with treating team important. How does syntonic phototherapy differ from red light therapy? Syntonic phototherapy uses specific colored light wavelengths delivered through eyes to affect autonomic nervous system and visual processing. Red light therapy (photobiomodulation) uses red or near-infrared light delivered to head or body to promote cellular healing. Different mechanisms, different applications, different evidence bases. Both emerging concussion treatments. Does insurance cover syntonic phototherapy? Insurance rarely covers syntonic phototherapy due to limited evidence base and emerging status. Cash pay common. FSA and HSA sometimes cover with medical prescription. Cost $100-$250 per session. Total course $1,500-$5,000. Payment plans sometimes available. Discuss cost with practitioner before starting. How long does syntonic phototherapy take? Syntonic phototherapy course typically 15-20 sessions over 4-8 weeks. Sessions 3-5 times per week. Each session 15-25 minutes. Reassessment every 5 sessions. Response varies between individuals. Some patients respond within 5-10 sessions. Others require full course before improvement noticed. Should I try syntonic phototherapy for post-concussion symptoms? Syntonic phototherapy reasonable adjunct after first-line treatments (vision therapy, vestibular rehabilitation, cervical treatment). Not replacement for standard care. Discuss with concussion team before starting. Realistic expectations essential given limited evidence. Cost consideration important. May help autonomic dysfunction, visual field constriction, and photophobia. References Patricios, J. S., et al. (2023). Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport, Amsterdam, October 2022. British Journal of Sports Medicine, 57(11), 695-711. PubMed Silverberg, N. D., et al. (2020). Management of concussion and mild traumatic brain injury: a synthesis of practice guidelines. Archives of Physical Medicine and Rehabilitation, 101(2), 382-393. PubMed