PURPOSE To validate the German-translated Low Luminance Questionnaire (LLQ), a vision-related quality of life scale assessing mainly mesopic and scotopic functioning, and to determine the relationship between the severity of vision impairment, ocular conditions, and low luminance-related visual functioning. METHODS In all, 274 participants, 184 patients with visual acuity <6/12 or a long-stan...

D pupil measurement is of great concern in corneal refractive surgery, as well as when phakic or multifocal intraocular lens (IOL) implantation is planned.1,2 Pupil size may influence the choice of ablation zone in refractive surgery and IOL design in cataract surgery, and it should be measured accurately so as not to end up with unfavorable postoperative outcomes, such as halos, glare, or poor...

To date, 12 macaque bipolar cell types have been described. This list includes all morphology types first outlined by Polyak (1941) using the Golgi method in the primate retina and subsequently identified by other researchers using electron microscopy (EM) combined with the Golgi method, serial section transmission EM (SSTEM), and immunohistochemical imaging. We used SSTEM for the rod-dense per...

This article reports the results of a multinational research project investigating visual performance in halflight (mesopic) conditions. From the experimental investigations using reaction time, detection threshold and recognition contrast threshold techniques, the results were used to develop a system for practical mesopic photometry, which provides an acceptably good fit to the experimental d...

At least twice daily our retinas move between a light adapted, cone-dominated (photopic) state and a dark-adapted, color-blind and highly light-sensitive rod-dominated (scotopic) state. In between is a rather ill-defined transitional state called the mesopic state in which retinal circuits express both rod and cone signals. The mesopic state is characterized by its dynamic and fluid nature: the...

EXPERTS in the field of visual research discussed the relationship between optical quality and quality of vision during a symposium at the XXIV Congress of the ESCRS.They also examined the other nonoptical factors that can influence visual performance. Estimations of the optical quality of the eye can be achieved by metrics in both the spatial and frequency domain, but ultimately sensitive subj...

OBJECTIVES To report changes in perceived visual functioning after surgery for symptomatic cataract with preoperative corrected distance visual acuity [CDVA] of 0.4 logMAR or better (Snellen equivalent, 20/50) and to investigate the relationship between any observed changes and preoperative physical characteristics and psychophysical consequences of the lens opacity and any changes in psychophy...

SYNOPSIS The aspheric, one-piece design of the Tecnis® ZCB00 intraocular lens provided higher mesopic contrast sensitivity and relatively constant refraction at different pupil sizes compared to the Sensar® AR40e. PURPOSE Comparing the impact on functional vision of the aspheric Tecnis® ZCB00 one-piece lens compared to the spherical Sensar® AR40e three-piece lens. SETTING National Eye Hospi...