Eckhard Hess’s claim that pupils dilate to pleasant images and constrict to unpleasant images was confounded because of inconsistent contrasts and luminances across his images. Building upon the work of Powell and Schirillo (2011) that explored multiple portraits by Rembrandt, we offer a new and promising methodology that overcomes this limitation. We presented leftwardor rightward-facing femal...

PURPOSE It has been hypothesized that central and peripheral refraction, in eyes treated with myopic overnight orthokeratology, might vary with changes in pupil diameter. The aim of this work was to evaluate the axial and peripheral refraction and optical quality after orthokeratology, using ray tracing software for different pupil sizes. METHODS Zemax-EE was used to generate a series of 29 s...

The radiant energy incident on the retina of a human viewing: the noon-day sun is calculated as 4.25 cal./cm.'-'-sec. with an image diameter of 0.16 mm., assuming an atmospheric transmission of 85'/( and a pupil diameter of 2.6 mm. The retinal irradiance under the limiting conditions of 100% atmospheric transmission and 6 mm. pupil diameter is shown to be only 29 cal./cm.-'-sec. This retinal ir...

PURPOSE To describe the use of anterior segment optical coherence tomography (OCT) in studying the dynamic dark-light changes of the anterior chamber angle. METHODS Thirty-seven normal subjects with open angles on dark-room gonioscopy and 18 subjects with narrow angles were analyzed. The dynamic dark-light changes of the anterior-chamber angle were captured with real-time video recording. The...

OBJECTIVE To examine the relationship between experienced mental workload and physiological response by noninvasive monitoring of physiological parameters. BACKGROUND Previous studies have examined how individual physiological measures respond to changes in mental demand and subjective reports of workload. This study explores the response of multiple physiological parameters and quantifies th...

PURPOSE To develop a flexible model of the average eye that incorporates changes with age and accommodation in all optical parameters, including entrance pupil diameter, under photopic, natural, environmental conditions. METHODS We collated retrospective in vivo measurements of all optical parameters, including entrance pupil diameter. Ray-tracing was used to calculate the wavefront aberratio...

purpose: to compare tecnis z9000 and acrysof iq aspheric intraocular lenses (iols) regarding spherical aberration and contrast sensitivity. methods: thirty-four eyes of 34 patients undergoing phacoemulsification cataract surgery were randomly assigned to implantation of tecnis or iq iols. three months postoperatively, best-corrected visual acuity (bcva), spherical aberration (with 4 and 6 mm pu...

OBJECTIVE To evaluate changes in the speed of pupil constriction and in anterior segment parameters after laser peripheral iridotomy (LPI) in patients with angle closure using anterior segment optical coherence tomography. METHODS In this prospective observational study, videos of pupil and anterior segment changes in response to illumination were captured with real-time video recording using...