Twenty-five asymptomatic subjects with normal binocular vision underwent determination of the magnitude and direction of their heterophoria and their fixation disparity. Fixation disparity was measured at a 2-m fixation distance with the phase-difference haploscope under conditions simulating those of casual seeing. When combined with careful attention to symmetrical control of accommodation, t...

Distractor interference effects were compared between distractors in the periphery and those placed at fixation. In 6 experiments, the authors show that fixation distractors produce larger interference effects than peripheral distractors. However, the fixation distractor effects are modulated by perceptual load to the same extent as are peripheral distractor effects (Experiments 1 and 2). Exper...

In visual search, some fixations are made between stimuli on empty regions, commonly referred to as "centre-of-gravity" fixations (henceforth: COG fixations). Previous studies have shown that observers with task expertise show more COG fixations than novices. This led to the view that COG fixations reflect simultaneous encoding of multiple stimuli, allowing more efficient processing of task-rel...

The complexity of eye-movement control during reading allows measurement of many dependent variables, the most prominent ones being fixation durations and their locations in words. In current practice, either variable may serve as dependent variable or covariate for the other in linear mixed models (LMMs) featuring also psycholinguistic covariates of word recognition and sentence comprehension....

conclusions evaluating the size of the patient’s pupils before, during and after the operation, careful history, consult, ct scan and mri would help to diagnosis. although no probable cause was found to explain the transient mydriasis in our patient. introduction unilateral mydriasis is a seriously significant finding in neurologic examinations indicating life-threatening conditions such as cer...

purpose: to report the rate of visual impairment in pervasive developmental disorder (pdd). methods: in this descriptive-analytic study 62 children with ppd diagnosed by a children psychiatrist were included. all subjects were evaluated for age, sex, systemic & eye conditions such as refractive errors, strabismus, oculomotor disorders, color vision, stereopsis, visual contact and fixation patte...

It is shown by complement fixation studies with protein antigens and specific immune rabbit sera that the rate of fixation of complement is determined by the concentration of antibodies in the immune sera, that the greater part of fixation of complement takes place during the 1st hour, and that fixation is practically completed at the end of 4 hours at ice box temperature. It is further shown t...

BACKGROUND We hypothesized that using a cadaveric Lisfranc ligamentous injury model, abduction stress would provoke greater post-injury motion than axial weightbearing between the medial cuneiform (MC1) and the base of the second metatarsal (MT2). Second, we hypothesized that both a tensioned suture-button device and a rigid screw fixation method could maintain a reduction and similarly restrai...

Posterior short-segmental fixation is reliable for the management of thoracolumbar fractures; however, it is associated with recurrence of kyphosis and failure of fixation. This study compared the short-term results of short-segmental fixation combined with intermediate screws with those of conventional intersegmental fixation in the treatment of monosegmental thoracolumbar fractures. The recor...

The ideal treatment method for fibular fractures associated with high-energy pilon injuries remains unknown. In this investigation, the authors reviewed a consecutive series of 137 patients who sustained high-energy pilon injuries and assessed the effect of fibular fixation and timing on radiographic and clinical outcomes. At a mean follow-up of 18.7 months, the authors found that the presence ...