The ways our eyes explore the world change subtly over time, affected by age and illness.
A new study now suggests some of those changes could be used to identify problems with memory and cognition.
Researchers from Canada and the West Indies built on previous work by searching for variations in eye viewing patterns in people with and without a diagnosis for a brain health issue .
"We show that memory decline is associated with an underlying reduction in explorative, adaptive, and differentiated visual sampling of the environment," write the researchers in their published paper.
The researchers ran eye-tracking tests on groups of young and elderly participants. Some of the volunteers had been diagnosed with conditions affecting memory or cognition, allowing the researchers t