title: Infrared methods for studying nystagmus and eye deviations in complete darkness with special reference to vertical nystagmus.
mesh_terms: D000328:Adult; D003623:Dark Adaptation; D003624:Darkness; D005260:Female; D006801:Humans; D007259:Infrared Rays; D008027:Light; D008297:Male; D008722:Methods; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000150:complications; D009759:Nystagmus, Pathologic / Q000150:complications / Q000175:diagnosis*; D014743:Videotape Recording