Faculty:Faculty of Medical Science
Areas of Expertise: Vision and eye research
Dr Sapkota is an overseas optometrist with research interests in visual functions of patients with diabetic retinopathy and age-related macular degeneration. His other research interest include the use of vision-based tests in detection of early cognitive decline linked to dementia.
Following his two-and-a-half years' service as an optometrist at BP Koirala Institute of Health Sciences in Nepal, Dr Sapkota came to the UK to pursue higher education. He obtained his Master's degree in Investigative Ophthalmology and Vision Science from the University of Manchester in 2006, and a PhD from the Department of Optometry & Ophthalmic Dispensing, Anglia Ruskin University, in 2010. Since then Dr Sapkota has been working as a post-doctoral research fellow in Vision and Eye Research Unit, Faculty of Medical Science, at Anglia Ruskin University.
Dr Sapkota is involved in a number of research projects.
(i). Evaluating whether visual short-term memory binding tests can be used as marker of early cognitive decline in patients at risk of developing Alzheimer’s Disease.
(ii). Examining how non-clinical parameters (knowledge, awareness, life-style, self-help) and clinical parameters (blood sugar, blood pressure, HbA1c levels) relate to severity of diabetic retinopathy in South Asian patients.
(iii). Evaluating the efficacy of paper-based user-friendly tests of visual functions to be used by patients with ocular disease for self-monitoring their condition at home.
(iv). Identifying self-help and improved awareness to reduce eye complications due to diabetes among South Asians in the United Kingdom.
Dr Sapkota has published findings in popular peer-reviewed scientific journals. He has presented papers and posters at several national and international conferences, and has obtained a number of research related grants, awards and prizes.
Summer studentships supervised to date: four
Sapkota, R.P., van der Linde, I., Lamichhane, N., Upadhyaya, T. and Pardhan, S, 2017. Patients with mild cognitive impairment show lower visual short-term memory performance for feature binding tasks. Dementia and Geriatric Cognitive Disorders: Extra 2017;7:74–86. doi:10.1159/000455831
Pardhan, S. and Sapkota, R., 2016. Eye complications of exposure to blue-violet light, Points de Vue, International Review of Ophthalmic Optics, www.pointsdevue.com, September 2016
Sapkota, R.P., Pardhan, S. and van der Linde I., 2016. Spatiotemporal Proximity Effects in Visual Short-Term Memory Examined by Target-Non-target Analysis. Journal of Experimental Psychology: Learning, Memory, and Cognition. Feb 4. [Epub ahead of print]
Sapkota, R., Pardhan, S. and van der Linde, I., 2015. Change detection in visual short-term memory: the relative impact of pairwise switches and identity substitutions. Experimental Psychology, 62(4), 232-239. doi: http://dx.doi.org/10.1027/1618-3169/a000294
Sapkota, R., van der Linde, I. and Pardhan, S., 2015. How does aging affect the types of error made in a visual short-term memory 'object-recall' task? Frontiers in Aging Neuroscience, 6 (346). doi: 10.3389/fnagi.2014.00346
Sapkota, R., Pardhan, S., and van der Linde, I., 2013. Manual tapping enhances visual short-term memory performance where visual and motor coordinates correspond, British Journal of Psychology 104, 249-264
Sapkota, R., Pardhan, S. and van der Linde, I., 2011a. The impact of extra-foveal information on visual short-term memory for object-position. Journal of Cognitive Psychology, 23, 574-585
Sapkota, R., Pardhan, S. and van der Linde, I., 2011b. Object-position binding in visual short-term memory for sequentially presented unfamiliar stimuli. Perception, 40, 538-548
John Robson, Raju Sapkota, John Kidd, Douglas Newman, & Shahina Pardhan (2016). Self-assessment of visual function using new single-use printed charts. The Association for Research in Vision & Ophthalmology, April 30-May 05, Seattle, Washington
Sapkota, R., van der Linde, I. and Pardhan, S. (2014), Effect of age on the types of error made in a visual short-term memory ‘object-recall’ task. British Congress for Optometry and Vision Science, September 8-9, Cardiff, Wales. Ophthalmic and Physiological Optics, 34, 684
Pardhan, S., Sapkota, R., & van der Linde, I. (2014). How does ageing affect visual short-term memory for identifying objects in their spatial locations? The Association for Research in Vision & Ophthalmology, May 4-8, Orlando, Florida. Investigative Ophthalmology and Visual Science, 55(13):779
Sapkota, R., van der Linde, I. and Pardhan, S. (2013), Age difference in visual short-term memory for object recall and location recognition. British Congress for Optometry and Vision Science, September 9-10, Glasgow, Scotland. Ophthalmic and Physiological Optics, 34, 105
Sapkota, R., Pardhan, S. and van der Linde, I. (2013), Change detection in visual short-term memory: The relative impact of pairwise swaps and object substitutions. Vision Sciences Society, May 10-15, Naples, FL. Journal of Vision 13, 324
Van der Linde, I., Pardhan, S. and Sapkota, R. (2013), Spatio-temporal priming facilitates visual short-term memory only in a forward direction. Vision Sciences Society, May 10-15, Naples, FL. Journal of Vision, 13, 328
Sapkota, R., Pardhan, S. and van der Linde, I. (2012), A load-specific influence of stimulus category on short-term memory for object and position. Vision Sciences Society Annual Meeting, May 11-16, Naples, FL. Journal of Vision, 12, 292
Sapkota, R., Pardhan, S. and van der Linde, I. (2011), Priming effects in visual short-term memory for object position: Evidence for name-addressable object files? 34th European Conference on Visual Perception, August 28 - September 1, Toulouse, France. Perception, 40, 82-83
Sapkota, R., Pardhan, S. and van der Linde, I. (2010), Feature binding across visual and manual domains: Evidence from a VSTM study. Vision Sciences Society Annual Meeting, May 7-12, Naples, FL. Journal of Vision, 10, 766
Sapkota, R., Pardhan, S. and van der Linde, I. (2009), Extra-foveal processing in visual short-term memory: Facilitatory or inhibitory? AVA Xmas Meeting, December 19 2008, Bristol, UK. Perception, 38, 467
Sapkota, R., Pardhan, S. and van der Linde, I. (2009), Dual impact of extra-foveal processing in human visual short-term memory. Vision Sciences Society Annual Meeting, May 8-13, Naples, FL. Journal of Vision, 9, 596
Sapkota, R., Pardhan, S., Tavassoli, A. and van der Linde, I. (2008), Visual short-term memory for unfamiliar visual stimuli. British Congress for Optometry and Vision Science, September 4-5 2007, Ulster, NI. Ophthalmic and Physiological Optics, 28, 99