Deaf driver with glass eye banned

[Spiderman]

Originally Posted by Messie

Sorry to correct you but most of our ability to perceive depth does not require two eyes.
It's really only retinal disparity that requires two eyes - all the other depth cues, superimposition, texture gradient, linear perspective, height in the visual plane, need only one eye and a fully developed ability to apply size constancy scaling.

Phew! Just taught my A level students all that so I hope they're reading this site!

bloody hell Messie....send that in to Qi, they'd love to know that info too i'd imagine.
I alway thought you needed both for depth perception...and i've got an A level in biology too

Originally Posted by Spiderman

I alway thought you needed both for depth perception...

That would make two of us, but then again I'm more into the hearing part of things!

IIRC there is a member on here who only has vision in one eye & he manages ok on the SV - sorry fella but I can't remember your username but I remember you being at AR07 - you know who you are!

[embee]

I seem to recall Father Ted explained it very succinctly to Dougal....................these (toy) cows are very small, those cows are far, far away

[Biker Biggles]

I assume the coffin dodger can pass the required driving eyesight test so why should he not drive?He has been banned for speeding not blindness.I wonder what his accident record is like,as I guess it is probably good.Coffin dodgers tend to get "banned" by the insurance industry once they start crashing the things.

I think you'll find depth perception with two eyes is only really up to 35ft or there abouts. It increases the further apart your eyes are. I remember this being said decades ago back when I was in school, physics I think.

[yorkie_chris]

Originally Posted by El Saxo

IIRC there is a member on here who only has vision in one eye & he manages ok on the SV - sorry fella but I can't remember your username but I remember you being at AR07 - you know who you are!

It's slark01, he does pretty well, except when he bottles in going down a hill and 'finds' a nice pile of mud and sheep muck to gently plop his bike into

Originally Posted by Beenz

I think you'll find depth perception with two eyes is only really up to 35ft or there abouts. It increases the further apart your eyes are. I remember this being said decades ago back when I was in school, physics I think.

Yup the depth perception comes from the differential angle your 2 eyes see, less pronounced at distace, similar theory applies to the resolution of lenses, the larger the lens the better the resolution.
This is how these "stereo binoculars" work.

Hasnt also only got one leg and answers to the name of lucky !!
















Ill get me coat.

Originally Posted by Spiderman

ridiculously you are alolowed to drive with just the one eye, its DVLA and your doc who make that decision.
Tho i agree that it shouldn't be allowed as there is no depth preception so stopping distances etc in an emergency situation could be very compromised.

I inadvertently rode and drove with just one operational eye for something like two years. I have serious double vision, and before it was officially diagnosed and corrected with a prism in my specs I just drove around with one eye shut.