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The phenomenon of change blindness has received a great deal of attention during the last decade, but very few experiments have examined the effects of the subjective importance of the visual stimuli under study. We have addressed this question in a series of studies by introducing choice as a critical variable in change detection (see Johansson, Hall, Sikström, & Olsson, 2005, Johansson, Hall,...

Of the 1306 male and 791 female Jat Sikhs of Patiala city and the surrounding villages between the age group 10-60 years, 50 males and one female were found to be having colour blindness, showing an incidence of 3.83% and 0.13% respectively. The study was done with the help if Ishihara Charts and Pickford Nicolson's anomaloscope. The type of colour blindness in males in its descending order of ...

purpose: to determine the prevalence and causes of blindness and low vision in khoozestan province in 2006. methods: this population-based cross-sectional study included all residents of khoozestan province during 2006. the study was designed according to world health organization recommendations. sample size was calculated based on the distribution of the population of khoozestan according to ...

purpose: vision disorders are closely associated with poverty, particularly blindness. we determined the prevalence of low vision and blindness in different socioeconomic levels. our goal was determination of correlation between socioeconomic determinants and visual acuity in varamin city. methods: this community based study was done on 2737 people over the age of 50 years, living varamin city ...

A review appropriateness of the current definition of blindness under National Programme for Control of Blindness (NPCB), Government of India. Online search of peer-reviewed scientific published literature and guidelines using PubMed, the World Health Organization (WHO) IRIS, and Google Scholar with keywords, namely blindness and visual impairment, along with offline examination of reports of n...