On Mon, 04 Sep 2006 19:01:51 -0500, Emily
wrote:

Andrew Sarangan wrote:
It is not true, but I carry one anyway. Contact lenses can dry out or a
foreign object can get stuck. If something like that happens, I will
take the lenses out, throw it away and wear the regular glasses. It
would be very difficult to attempt to wet the lens and put it back into
the eye while flying.

I learned that it's even harder for me to land while wearing glasses.
Tried one night, and my depth perception was so bad I had to have my
friend land. I got to maybe fifty feet and simply couldn't judge height
anymore and was honestly didn't think I could land.

Guess I don't know what I'd do if I lost a contact.

As for judging height I know exactly what you mean.
I'd started my PPL before getting the medical and had been flying
about a week and just started to get the landings right (ish..!).
Went for the medical found out after 48 years I had astigmatism and
required glasses. That absolutely ruined my landings. I first tried to
flare about 50ft and pages that have straight sides were not parallel.
When walking I felt as though I'd lost about 6 inches in height, all
very strange. What a shambles for a few days. After that I got used to
them.

Now I can put the glasses on or off and don't notice any distortion,
unless I'm specifically looking and then it's minimal. I don't notice
much change in vertical perspective either so I think if you persist
the brain will accommodate the changes given a little time.

My FAA certificate says:
"Must wear corrective lenses"

My UK CAA licence says:
"Must wear corrective lenses and carry a spare set of spectacles"

The only comment I would make is if you wear varifocals ensure your
glasses are set so you can read the map, instrument panel and distance
without tilting your head too much.