Purpose Astigmatic subjects are adapted to their astigmatism and perceptually recalibrate
upon its correction. However, the extent to which prior adaptation to astigmatism affects …

New multifocal phase designs aiming at expanding depth of focus in the presbyopic eye are
presented. The designs consist of multiple radial or angular zones of different powers or of …

We determined the degree to which change in visual acuity (VA) correlates with change in
optical quality using image-quality (IQ) metrics for both normal and keratoconic wavefront …

Visual artists and photographers believe that a viewer's gaze can be guided by selective use
of image clarity and blur, but there is little systematic research. In this study, participants …

Adaptation to a blurred image causes a physically focused image to appear too sharp, and
shifts the point of subjective focus toward the adapting blur, consistent with a renormalization …

Background The image formed by the eye's optics is blurred by the ocular aberrations,
specific to each eye. Recent studies demonstrated that the eye is adapted to the level of blur …

We explored the perception of image focus in patients with cataracts, and how this
perception changed following cataract removal and implantation of an intraocular lens …

Purpose It is well known that acuity slowly decreases in the later decades of life. We wish to
determine the extent by which 4-year longitudinal acuity changes can be accounted for by …