Head Mounted Unit for the Measurement of Visual Performances

摘要

Human visual performances (visual acuity, contrast sensitivity) are commonly measured under heterogeneous ambient luminance conditions, generally referred to as "mescopic", without any control of the subject's pupil size. Actually, the optical performances of the eye are strongly dependent on the pupil aperture, due to the increasing effect of optical aberrations, mainly spherical aberration, which progressively degrade vision.