Another advantage with the 'stick-on' bifocals is that you can
carefully trim them to make them narrow in width (about 60% of
their original width), thus preserving the ability to look
'outside and down' without their intrusion.

Jim Kelly


"Eric Greenwell" wrote in message
...
Jim Kelly wrote:
Marc makes good points, to which I would add:
1. Remember that it helps to not change your focal length such
that the outside view is out of focus. Folks over 45yrs or so
will apparently have difficulty in this regard.

For a lot of pilots, that puts the PDA quite far away. I don't
need
glasses for distance, but I do need reading glasses. "Sunreader"
sunglasses combine nonprescription sunglasses with bifocal areas
low on
the glasses; additionally, the bifocal area has very little
tinting.
This arrangement is perfect for PDA use in a glider. Cheap, too,
at $25.

Pilots needing prescription sunglasses could get them with the
bifocal
area, preferably with very little tinting. More than $25, of
course!

In any case, definitely look at the PDA you are considering, and
do it
in the sunlight. Their screens differ markedly in visibility, and
some
of the older ones are better than the newer ones. I use a 3835,
which is
noticeably better than the newer 2210 I first purchased.

2. You need to be able to use your pointer finger easily, and
sometimes to eject the stylus.

I suppose this varies with the software you use, as my finger
works fine
in flight using SeeYou Mobile. On the ground, for entering tasks
and
other fiddly things not needed in flight, I do use the stylus.

--
Change "netto" to "net" to email me directly

Eric Greenwell
Washington State
USA