Motorists over the age of 75 face compulsory tests of their eyesight and ability to drive under proposals being considered by ministers．
The biggest overhaul of motoring law in a generation could also lead to all drivers having to give assurances（保证） of their fitness to get behind the wheel every 10 years．
Other changes under consideration include issuing（发放） daylight driving licenses for motorists with night blindness, together with stricter checks on all drivers whose medical condition brought a threat to other road users．
