Abstract
Age-related decrease of crystalline lens transmittance is thought to be a factor affecting non-image forming (NIF)
responses such as melatonin suppression and pupillary light reflex (PLR). In this study, we estimated pupillary spectral
sensitivities of children and young adults and we compared them. Fourteen healthy primary school children and
thirty healthy university students participated in the present study. The estimated spectral response curves tended
to differ between the child group and the adult group (F-test, p ＆lt; 0.1), and their peak sensitivities were 474.2 nm and
479.7 nm, respectively. Our findings indicate that spectral sensitivity of PLR to light depends on age, supporting the
possibility that age-related change in lens transmittance is associated with NIF responses.
