It's a familiar problem to many as they enter middle age – the struggle to focus on close-up objects such as newsprint or embroidery.
And some people even face the added frustration of having to carry spectacles of varying strengths to allow them to carry out different tasks.
But now a British company has come up with an ingenious solution to get around the problem – spectacles where the focus can be altered in the same way as on a pair of binoculars, DailyMail reports.
A tiny dial on the arms of each pair of the Eyejusters glasses enables the wearer to bring whatever they want to look at into sharp focus.
Creator Owen Reading explained: ‘Lots of people need reading glasses but they need glasses with lots of different strengths.
‘They might have a pair with +1 prescription-strength lenses for the computer, +2s for reading, and +3s for really close-up stuff.
Mr Reading came up with the idea for Eyejusters with friend David Crosby, who studied physics at Oxford with him.
The concept is simple: the lenses in glasses work to focus images by changing the direction of light beams entering them.
When a person with long sight wants to look at an object that is very close to them, they will need fat lenses with a highly convex ‘bulging’ shape.
When they want to look at something a little further away, they will need thinner ones with a less convex shape.
Eyejusters work because each lens in the spectacles is actually made up of two, and the pair slide past one another as the dial is turned to give a different shape.