I don't think that collisions between gliders is a
matter of pure eyesight, it is more situational awareness
and expectation. There is also a school of thought
that says that an experienced pilot uses his experience
not to get into situations where quick reflexes are
involved. I am not sure that flying is an area where
reflex actions are necessarily a good thing.

Young bull to old bull 'Lets run down the paddock and
service some of those cows'
Old bull to young bull, 'Lets walk down and service
all of them'

At 18:36 01 May 2004, Michel Talon wrote:
Jeff Dorwart wrote:


Let me mention an important factor here, the age of
the pilot.
I have constated on myself that as one ages, the field
of vision
becomes narrower, not to mention that attention is
not of the same
quality, reflexes become poor, etc. This could well
be one of the most
important factors at play here. Sooaring is much much
bettre fitted to
young people in excellent health and doing a lot of
sports (i mean
sports like squash) than to old people.




--

Michel TALON