Change blindness

Although at any instant we tend to expertise an expensive, elaborate visual world, we tend to don’t use such visual details to create a stable illustration across views. Over the past 5 years, researchers have centered progressivelyd more} on ‘change blindness’ (the inability to discover changes to an object or scene) as a way to look at the character of our representations. Experiments employing a various vary of strategies and displays have created strikingly similar results: unless a modification to a visible scene produces a localizable modification or transient at a selected position on the tissue layer, generally, individuals won’t discover it. we tend to review theory and analysis motivating work on modification visual disorder and discuss recent proof that individuals ar blind to changes occurring in images, in motion footage and even in real-world interactions. [1]

Global data on blindness

Globally, it’s calculable that there area unit thirty eight million persons WHO area unit blind. Moreover, an extra one hundred ten million individuals have low vision and area unit at nice risk of changing into blind. the most causes of visual impairment and low vision area unit cataract, trachoma, glaucoma, infestation, and xerophthalmia; but, poor information on visual impairment from causes like diabetic retinopathy and age-related degeneration preclude specific estimations of their international prevalence. The age-specific prevalences of the main causes of visual impairment that area unit associated with age indicate that the trend are going to be for a rise in such visual impairment over the decades to return, unless energetic efforts area unit created to tackle these issues. additional information collected through standardized methodologies, victimization internationally accepted (ICD-10) definitions, are needed. information on the incidence of visual impairment because of common causes would be helpful for conniving future trends additional exactly. [2]

Childhood blindness

Purpose: the target of this study was to summarize offered knowledge relating to paediatric glaring diseases worldwide and to gift the foremost up-to-date info on childhood cecity within the us. Methods: we have a tendency to obtained knowledge from a whole search of the globe literature and from direct contact with every of the faculties for the blind within the us. Results: 5 % of worldwide cecity involves kids younger than fifteen years of age; in developing countries five hundredth of the population is during this cohort. By World Health Organization criteria, there ar one.5 million kids worldwide WHO ar blind: one.0 million in Asia, 0.3 million in continent, 0.1 million in geographical region, and 0.1 million within the remainder of the globe. There ar marked variations within the causes of paediatric cecity in several regions, apparently supported socioeconomic factors. [3]

Trends of Visual Impairment and Blindness in the Singapore Chinese Population over a Decade

We evaluated the prevalence of disability (VI) and visual disorder among Chinese adults within the Singapore Chinese Eye Study (SCES, 2009–2011), and compared the trends with the Tanjong Pagar Survey, Singapore (TPS), conducted a decade earlier. The SCES comprised of three,353 Chinese adults aged ≥40 years (response rate, 72.8%). Participants underwent standardized examinations, as well as measurements of presenting, and best-corrected acuity (VA). Bilateral VI (VA < 20/40 to ≥20/200) and visual disorder (VA < 20/200) were outlined supported the us definition (better-seeing eye). Age-standardized prevalence was calculated victimization the 2010 Singapore Chinese Population Census. Primary causes and factors related to VI and visual disorder were evaluated. [4]

Multiple Myeloma Relapse Presenting as Unilateral Blindness

Multiple Myeloma could be a chronic illness. whereas medical aid is essentially centered for management, relapse is inevitable. Central system relapse of metastatic tumor is a smaller amount common. Unilateral painless sightlessness could be a rare entity and its incidence within the setting of myeloma has not been normally rumored. we have a tendency to encountered a case of myeloma on treatment, WHO developed unilateral sightlessness and soon confirmed to own relapse of illness. [5]

Reference

[1] Simons, D.J. and Levin, D.T., 1997. Change blindness. Trends in cognitive sciences, 1(7), (Web Link)

[2] Thylefors, B., Négrel, A.D., Pararajasegaram, R. and Dadzie, K.Y., 1995. Global data on blindness. Bulletin of the world health organization, 73(1), (Web Link)

[3] Steinkuller, P.G., Du, L., Gilbert, C., Foster, A., Collins, M.L. and Coats, D.K., 1999. Childhood blindness. Journal of American Association for Pediatric Ophthalmology and Strabismus, 3(1), (Web Link)

[4] Trends of Visual Impairment and Blindness in the Singapore Chinese Population over a Decade
Yih-Chung Tham, Sing-Hui Lim, Yuan Shi, Miao-Li Chee, Ying Feng Zheng, Jacqueline Chua, Seang-Mei Saw, Paul Foster, Tin Aung, Tien Yin Wong & Ching-Yu Cheng
Scientific Reports volume 8, (Web Link)

[5] Badola, A., Khanna, T., ., K. and Kumar Verma, S. (2018) “Multiple Myeloma Relapse Presenting as Unilateral Blindness”, International Blood Research & Reviews, 8(4), (Web Link)

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