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Personal profile

Research Biography

Dr Khadka is an Optometrist by training. He was awarded PhD from Cardiff University (UK), followed by Post-doctoral fellowship at Flinders University. His main research interests are quality of life (QoL), patient-reported outcome measurements (PROM), psychometric methods including families of Rasch analysis, item banking, computer adaptive testing system and low vision rehabilitation. His work is focussed on finding ways to improve and optimize measurement qualities of ophthalmic QoL questionnaires. He is currently developing smarter and tehcnologically advanced QoL measuring questionnaires in the forms of item banks to be implemented via computer adaptive testing system (The Eye-tem Bank project) for all eye diseases across all population worldwide.

Research Interests

  • Patient-reported outcome measures
  • Visual function, Quality of Life Questionnaires
  • Item banking and computer adaptive testing system
  • Vision related outcome measures
  • Low vision rehabilitation outcomes and Low vision aids

Supervised Students Successes

  • Oct 2020 Dr Louise Heuzenroeder - PhD
  • Jun 2020 Sheela Evangeline Kumaran - PhD
  • Jan 2019 Dr Himal Kandel - PhD
  • May 2018 Dr Mallika Prem-Senthil - PhD


  • Registered

Research Areas

  • Health and social care economics
  • Healthy ageing and aged care
  • Speech pathology

Supervisory Interests

  • Patient-reported outcomes
  • Visual function and quality-of-life questionnaires
  • Item bank and computer adaptive testing system
  • Vision-related outcome measures
  • Aged care
  • Health economic evaluation
  • Ageing
  • Health-related quality of life
  • Valuing health related quality of life
  • Health services research


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