Technology, which is usually used in state of the art telescopes to find distant stars, is set to help diagnose world's most common form of sight loss in adults.
Age-related macular degeneration (AMD) leads to central vision loss when looking at something directly ahead.
Engineers at the UK Astronomy Technology Centre (UK ATC), which is a part of the Science and Technology Facilities Council (STFC), normally design and make instruments for detection of faint light from distant stars and galaxies.
However, the specialist cameras, light technology and software have now been adapted to create a unique 'retinal densitometer,' which picks up the earliest stages of AMD by measuring how the eye responds to light.
It is currently being trialled by Cardiff University's School of Optometry and Vision Sciences' scientists.