purpose : to determine the prevalence of visual impairment, blindness, and low vision among the elderly population of sari in northern iran methods : random cluster sampling of 1,185 selected individuals over 54 years of age, of whom 79.1% participated. participants underwent eye examinations to test presenting visual acuity (va), best corrected visual acuity (bcva), and refraction. results : b...

driver fatigue is one of the main causes of road accidents. this study aimed to estimate bus driver fatigue through performance measures in a virtual driving environment. the study was conducted on thirty professional male bus drivers participated in a two-hour drive session. the driver subjective fatigue was assessed by fatigue visual analogue scale (f-vas) on 10 min intervals. at the same tim...

background: vision therapy/orthoptics(vt/o) is a package of treatments that enables patients to achieve the maximum level of visual performance.the aim was to determine the effect of three months vision therapy/orthoptics on best corrected visual acuity (bcva), fusion, stereopsis and ocular alignment in 3-7 year old children. materials and methods: in this randomized clinical trial study, 80 ch...

the relative eye size, types of visual cell and mosaic, and the existence of retinal tapetum in the eyes of the spotted barb puntius binotatus were determined to gain baseline information on its visual capability. the p. binotatus acquired relatively larger eye size than the other similar sized freshwater fish species with its retina being contained both cone and rod visual cells (cone ellipsoi...

Purpose: Postural balance deficit is one of the common post-stroke disabilities. Providing visual biofeedback while balance activities are performed is a way to improve postural balance disorders following stroke. But among the research published, there is incoherency about the positive effects of visual biofeedback therapy. The purpose of this study was to investigate the effects of usin...

In the present paper, an efficient method for three dimensional aircraft pattern recognition is introduced. In this method, a set of simple area based features extracted from silhouette of aerial vehicles are used to recognize an aircraft type from its optical or infrared images taken by a CCD camera or a FLIR sensor. These images can be taken from any direction and distance relative to the fly...

background:  distal femur wedge osteotomies for varus or valgus alignment of the lower extremity could be done in either uniplanar or biplanar fashion.:union: time and stability of the osteotomy site has been considered important in this anatomic region. in this study, clinical and radiographic findings of biplane distal femur osteotomy were reported. methods: clinical, functional, and radiolog...

objective: children with attention deficit hyperactivity disorder (adhd) do not process most information due to inattention and loss of the opportunity to save and retrieve information. therefore, these children experience memory impairment. although visual memory has been previously studied in children with adhd, iconic memory in these children has been less evaluated. we aimed to study the po...