Reply To: Does RLT have side effects? Home › Forums › Red Light Therapy › Does RLT have side effects? › Reply To: Does RLT have side effects? October 7, 2020 at 3:30 pm #915 MarkusParticipant Red light therapy is also helping to protect our retinal from damage, vision loss, healing our eyes from injuries. But, as DefianceLulu said, it depends on how sensitive your eyes is.