by John Sanders on Wed May 13, 2009 5:12 pm
Hi Peter,
I don't know the answer to your question, but before anyone asks I wanted to make it clear that bioptic telescopes are not legal for driving in the UK. And probably with good reason.
Bioptic lenses improve your distance vision, but like all telescopes, binoculars and monoculars they decrease your field of vision. So, you may be able to read the sign 200 metres ahead telling you it's the turning you want, but you would probably miss the car overtaking you in the outside lane.
John