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Terry,
Were your graduated lenses a full size lense?
My young'uns insisted that Dad get a trendy Latham style pair with
little lenses.
Maybe this was too much for this type of lense.
Would like to have only one pair of specs, so am willing to try
again.
Christopher McDonnell
"Womma Mu Kurta"
Mount Barker Springs
South
Australia
61 8 8391 0482
----- Original Message -----
Sent: Thursday, 30 September 2004 9:16
AM
Subject: Re: [aus-soaring] Best
sunglasses for gliding ?
Christopher Mc Donnell wrote:
A year ago I got a set of those graduated lenses which can be used for both
reading and distance (astigmatism) in my case.
Never again. Hopeless for cockpit use, not to mention I always felt slightly
dizzy on the ground even though I persevered with them for three months.
I'll continue with the inconvenience of two sets for now.
G'day
Christopher and others,
Interesting - I've just had the opposite
experience. The time had come for "full time" glasses
- I'd expected it - and the optometrist suggested that I try graduated
ones with polarizing magnetic clip-ons for outdoor use, something quite
similar it seems to what Jason is using. (I've always used Polariods in
the past).
Despite initial reservations about the graduated lenses -
room swimming, keyboard rocking, and field of view too narrow for computer
work - (they were definitely going back after the first day) - I did
persevere with them as suggested, and I find that after some two months I have
become quite used to them. I still have to be wary of some
perceived "distortion" under some situations - e.g. objects which come
straight out at 90 degrees from a plane surface (instrument knobs) can appear
to be "bent", and drawing lines on materials can produce some imaginary
optical illusions, but I think the old brain is learning to accommodate and
allow for these annoyances.
I still use a dedicated "close up" pair for
fine electronic work, but the others have passed all practical tests, and
after a few flights now under varying conditions, I'm reasonably happy with
them. I didn't realise how much I was compromising
(guessing?) in reading the fine detail on the instrument panel up until now.
The clip-on polarizing lenses are not tinted to the same degree as
previous commercial Polaroids, but still make for a quite acceptable reduction
in glare when needed.
However, the full time glasses are proving
a hassle on the motorbike. The turbulence around the lenses is a
real issue, and I'm not prepared to risk losing the clip-ons in this
situation. Fortunately our club has (I think) pretty well passed
over looking at open cockpit single seaters these days, so that issue
shouldn't translate into flying compromises.
I take the point
raised by several contributors about polarizing glasses (filters) being less
than desirable for some flying situations, however, once you are
committed to prescription glasses full time, I'm just not sure that
there are too many alternatives available. Whilst the eye may use
a larger iris setting in the pseudo dark world of a polarizing or other tinted
lens, I would expect the brain to still compensate pretty quickly for any
reduction in depth of field which occurs as a consequence.
For mine, the reduction of glare when using a polarizing filter is the
essential requirement, and so far, I haven't seen any unwanted secondary
interactions with windscreens, canopies or other "transparent"
objects. It would be interesting to know if it's possible to
get "clear", that is non-tinted polarizing glasses (or clip-ons) as used in
photographic polarizing filters.
However, having used full
time glasses for a couple of months, I've become addicted to them.
Trying to do some things without them is now a real challenge.
Regards,
Terry
8-)
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