Providing single lens distance glasses to older people instead of multifocal glasses is a simple and inexpensive way to cut falls in those who regularly take part in outdoor activities.
This was the result of a study by Australian researchers published in the BMJ online.
They said multifocal glasses have optical defects that can impair balance and cause falls.
Their study of 606 people found swapping multifocal glasses for single lens pairs cut falls by 40 per cent over 13 months in subjects who regularly went outdoors.
Use of single lens glasses did not reduce falls in more fragile older people or those who spent more time indoors.