London's City University has created a video simulation of what a driver with advanced glaucoma would see.
Ophthalmologist Anath Viswanathan, from London's Moorfields Eye Hospital, told BBC's Breakfast that the condition would impact how motorists view hazards on the road.
He was speaking after hearing the story of Alison Archard, who discovered she had glaucoma by chance after she having her sight tested when she visited an optician with her young daughter.
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