London, Jan 26 (Agencies): If you think that older people often struggle to drive because they are unable to see, think again, for a new study has found that it's due to the reason that they see too much.

Researchers have carried out the study and found that many elderly people struggle to drive as they lose the ability to block out unwanted background detail.

In their study, the researchers have discovered the part of the brain responsible for this decline, and hope the breakthrough could lead to new training techniques to overcome it, 'The Daily Telegraph' reported.

According to them, in a young person, a brain region called the middle temporal visual area actively suppresses often irrelevant background motion so that he or she can concentrate on smaller objects in the foreground.

Because the brain is spending its limited resources constantly paying attention to unimportant background objects, it has a harder time noticing the motions of smaller objects. This means it becomes confused.

"The amount of visual information around us is huge, and we don't have the brain power to process it all. Older adults are better at perceiving large background-like motions.

On the other hand, young healthy people, perceptually suppress such visual motions.

"This may sounds like a good thing for older adults, but if presented with a highly dynamic visual scene (ie, during driving) suppression of often-irrelevant background motions is advantageous. Basically, this is one more thing that makes driving harder as we age," said lead researcher Prof Duje Tadin at the University of Rochester.