Related Experiment Video
Updated: May 15, 2026

Using Retinal Imaging to Study Dementia
Published on: November 6, 2017
A commentary on studies presenting projections of the future prevalence of dementia
Sam Norton1, Fiona E Matthews, Carol Brayne
1Institute of Public Health, University of Cambridge, Cambridge, UK. sam.norton@kcl.ac.uk
Background:
Population ageing over the first half of this century is likely to lead to dramatic increases in the prevalence of dementia. This will affect all regions of the world, but particularly developing regions. Dementia projections have been used extensively to support policy. It is therefore important these projections are as accurate as possible.
Discussion:
In this paper we provide a commentary on studies projecting the future prevalence of dementia for the world or for individual continents. We identify some important limitations of the methods used in published projections and provide recommendations to improve the accuracy of future projections, and allow for the checking of the accuracy of the predictions.
Summary:
Accurate projections of dementia incidence, at both the global and local level, are essential for healthcare planners.
Related Concept Videos
Dementia
The progression of dementia is generally gradual.
Dementia l: Introduction
Alzheimer Disease l: Introduction
Alzheimer's Disease: Overview
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
Alzheimer Disease ll: Pathophysiology
Alzheimer's Disease: Treatment
