Speaking from experience..... about 30 seconds. Caution though.... they do
make for lazy pupils.

CM

"katysails" wrote in message
...
My present prescription sunglasses are gray, but very dark. I really do
not like the purple clip-ones...makes the world look like a strange
place...was wondering about the kind that darken when you go out and
lighten when you go back in and was wondering about response time...

"Red Cloud®" wrote in message
...
On Tue, 05 Apr 2005 21:42:25 GMT, "katysails"

wrote:

I have to order new sunglasses this year. My old prescription glasses
are
too dark and filter out way too much light. I've been experimenting with
some clip-ons over my glasses and tried purple and amber, but they still
seem to filter out too much. I'm looking for some color that will work
on
both land and sea and filter glare more than light....Recommendations?

I would recommend you get gray colored polarized lenses. The reason fo
gray is
that it won't screw up how you see colors, like purple and amber lenses
will.
The polarization cuts glare, which is your biggest problem. You can
specify a
lighter shade as well. I have bi-focal polarized lenses and I got them a
shade
that is dark enough to prevent eye fatigue, yet light enough that I can
easily
read a chart without taking them off.

rusty redcloud