Abstract
Retrogradation of MTF (Modulation Transfer Function) properties for human visual sustem according to ages was measured by the MTF measurement apparatus, which produced interference fringes on subjects retina directly. Temporal properties were also measured by drifting interference fringes produced by tilt of a thick glass plate placed in the optical system.
It was shown high spatial frequency properties were gradually deteriorated untill forty years old, and after the forty years old, spatial properties for all the spatial frequency region were affected. For temporal frequency properties, significant evidence was that higher sensitivity for a drifting pattern, was appeared at relatively lower spatial frequency region. If two spatio-temporal frequency neural network systems are assumed, the above evidence is well explained.
