title: Determining scotopic pupil size.
authors.forename: Arthur C K
authors.initials: AC
authors.lastname: Cheng
authors.forename: Srinivas K
authors.initials: SK
authors.lastname: Rao
authors.forename: Dennis S C
authors.initials: DS
authors.lastname: Lam
mesh_terms: D003623:Dark Adaptation; D003941:Diagnostic Techniques, Ophthalmological / Q000592:standards*; D006801:Humans; D007259:Infrared Rays; D007498:Iris / Q000033:anatomy & histology*; D010781:Photography / Q000295:instrumentation; D011680:Pupil; D015203:Reproducibility of Results