Hi,

Here are a few papers on this topic:

Leisman G, Machado C, Machado Y, Chinchilla-Acosta M. Effects of Low-Level Laser Therapy in Autism Spectrum Disorder. Adv Exp Med Biol. 2018;1116:111-130. doi: 10.1007/5584_2018_234

Surapaty IA, Simadibrata C, Rejeki ES, Mangunatmadja I. Laser Acupuncture Effects on Speech and Social Interaction in Patients with Autism Spectrum Disorder. Med Acupunct. 2020 Oct 1;32(5):300-309. doi: 10.1089/acu.2020.1417

Ceranoglu TA, Cassano P, Hoskova B, Green A, Dallenbach N, DiSalvo M, Biederman J, Joshi G. Transcranial Photobiomodulation in Adults with High-Functioning Autism Spectrum Disorder: Positive Findings from a Proof-of-Concept Study. Photobiomodul Photomed Laser Surg. 2022 Jan;40(1):4-12. doi: 10.1089/photob.2020.4986

Khongrum J, Wattanathorn J. Laser Acupuncture at HT7 Improves the Cerebellar Disorders in Valproic Acid-Rat Model of Autism. J Acupunct Meridian Stud. 2017 Aug;10(4):231-239. doi: 10.1016/j.jams.2017.06.006

Khongrum J, Wattanathorn J. Laser Acupuncture Improves Behavioral Disorders and Brain Oxidative Stress Status in the Valproic Acid Rat Model of Autism. J Acupunct Meridian Stud. 2015 Aug;8(4):183-91. doi: 10.1016/j.jams.2015.06.008

Hello, you mean laser effects, physical? I am not sure when is effective,