Anyone have vision issues?

On Fri, 31 Aug 2007 07:36:51 -0500, Emily
wrote:

My peripheral vision is terrible with glasses

Why would that be? Are they wraparound?

Blue skies! -- Dan Ford

Claire Chennault and His American Volunteers, 1941-1942
new from HarperCollins www.FlyingTigersBook.com

"Cubdriver" usenet AT danford DOT net wrote in message
...
On Fri, 31 Aug 2007 07:36:51 -0500, Emily
wrote:

My peripheral vision is terrible with glasses

Why would that be? Are they wraparound?

Blue skies! -- Dan Ford

Claire Chennault and His American Volunteers, 1941-1942
new from HarperCollins www.FlyingTigersBook.com

One quick look at a pair of glasses for extreme myopia will explain it--they
are relatively small, very thick at the edges, and heavy. They really do
look like bottle bottoms, and they make me thankfull that my own required
correction is less than -1.5

Peter

In rec.aviation.piloting, on Fri 31 Aug 2007 01:14:27p, "Matt Barrow"
wrote:

Are you assuming she flies in an open cockpit?

No, I'm just pointing out that there are glasses that curve around the head
and they might have a prescription along the edges that would work for her.

"Cubdriver" usenet AT danford DOT net wrote in message
...
On Fri, 31 Aug 2007 16:25:01 GMT, wrote:

I can't shoot skeet with my flying glasses and can't fly with the
skeet glasses, but both work perfectly for what they were intended
for.

Good counsel!

One alternative?

I shoot Sporting Clays with medium amber lenses, and fly with dark grey.
These are magnetic and clip onto my prescription glasses which have titanium
frames.

Matt Barrow wrote:

"Cubdriver" usenet AT danford DOT net wrote in message
...
On Fri, 31 Aug 2007 16:25:01 GMT, wrote:

I can't shoot skeet with my flying glasses and can't fly with the
skeet glasses, but both work perfectly for what they were intended
for.

Good counsel!

One alternative?

I shoot Sporting Clays with medium amber lenses, and fly with dark grey.
These are magnetic and clip onto my prescription glasses which have titanium
frames.

The skeet glasses are single lens, shooting yellow, corrected for objects
at infinity, and the center of correction is slightly up on the lenses
lined up with the eyeball center when my head is down on the stock.

The flying glasses are bifocal lenses, clear, corrected for objects at
infinity on the top, corrected for the mean distance to the panel on
the bottom, and the separation line is adjusted such that it appears
the same place as the very top of the panel when I sit upright so I
don't see the line.

How'd that happen?

For the skeet glasses, he had me hold a stick like I would a shotgun,
got in front of me and marked the blank lenses where the eyeball was
looking.

For the flying glasses, he gave me the frames with blank lenses and
had me measure the distance from my nose to the center of the panel
and put tape on the lenses that lined up with the top of the panel.


--
Jim Pennino

Remove .spam.sux to reply.

I need -10 correction. Before I even started lessons I did my 3rd
class medical and had no problems passing. I was 20/20 in one eye and
20/30 in the other. Funny thing was when I had my regular exam a few
weeks later, my eye doctor said I was 20/20 in both eyes.

Fortunately my astigmatism is not too bad. I am able to drive with my
glasses, but I do not like to because I lose so much of my peripheral
vision. I do fly with my contacts, but I plan on practicing with
glasses in the event that I have to switch over to them in mid flight.

I am also like you that I can not be corrected to 20/20 with lasik
because of thin corneas. If my astigmatism gets worse I may get
partially corrected anyway. Maybe someday they will get to the point
where they can just clone us some new eyeballs!

On Aug 31, 7:36 am, Emily wrote:
Ash Wyllie wrote:
Emily opined

Not a directly piloting question, but it certainly affects it.

My second class medical expires in December, so panic is starting to
set in.

I have bad eyes.

IIUC, you wear contacts? Why not use old-fashioned glasses?

The question I always get. :-) I have a fairly strong correction (-7
and -8). My peripheral vision is terrible with glasses and since the
focal point (?) is slightly in front of my eyes, there's a fair amount
of distortion and depth perception problems. I can't remember exactly
why the distortion happens, but it does with glasses. I wear them
around the house, but can't even drive in them, especially at night.
Flying - at least landing - is out of the question with glasses.

javaguy11111 opined

I need -10 correction. Before I even started lessons I did my 3rd
class medical and had no problems passing. I was 20/20 in one eye and
20/30 in the other. Funny thing was when I had my regular exam a few
weeks later, my eye doctor said I was 20/20 in both eyes.

When you make a camera out of jelly, it is not very stable.

Fortunately my astigmatism is not too bad. I am able to drive with my
glasses, but I do not like to because I lose so much of my peripheral
vision. I do fly with my contacts, but I plan on practicing with
glasses in the event that I have to switch over to them in mid flight.

I am also like you that I can not be corrected to 20/20 with lasik
because of thin corneas. If my astigmatism gets worse I may get
partially corrected anyway. Maybe someday they will get to the point
where they can just clone us some new eyeballs!

On Aug 31, 7:36 am, Emily wrote:
Ash Wyllie wrote:
Emily opined

Not a directly piloting question, but it certainly affects it.

My second class medical expires in December, so panic is starting to
set in.

I have bad eyes.

IIUC, you wear contacts? Why not use old-fashioned glasses?

The question I always get. :-) I have a fairly strong correction (-7
and -8). My peripheral vision is terrible with glasses and since the
focal point (?) is slightly in front of my eyes, there's a fair amount
of distortion and depth perception problems. I can't remember exactly
why the distortion happens, but it does with glasses. I wear them
around the house, but can't even drive in them, especially at night.
Flying - at least landing - is out of the question with glasses.




-ash
Cthulhu in 2007!
Why wait for nature?

On Fri, 31 Aug 2007 17:28:28 -0500, Emily
wrote:


That's exactly why not. Cubdriver's giving me the same spiel I get from
friends and family - you know, the ones with something like -1.0
correction. Trust me, vanity's on the list, but it's way after the
vision issues that glasses cause.

Could I learn to land a plane with depth perception off that badly? Of
course - at the risk of having to relearn to walk every time. It takes
a tremendous amount of acclimation and isn't something that's real
practical.

And as far as the peripheral vision goes, well, I kinda need that to see
traffic. It's something else you don't realize the importance of until
you don't have it. Wraparound glasses (for myopia) causes an incredible
amount of distortion on the edges and are practically useless.

My numbers may be similar to yours: - 8 and -8.5 sph, -2.25 cyl, and
+2.25 for reading.

I use glasses made of plastic with higher reafraction coefficient so
they don't have to be very thick and heavy (my glasses together with
the frame weigh only 1 oz) and, because of reduced thickness,
distortion is minimal. That also improves depth perception. I still
have diffuclties hiking downhill - I never know how far is that rock I
want to step on, but my landings are not affected at all.

I also keep lenses reasonably small - nothing extreme, whatever is
fashionable these days, not the big lenses that were common tweny
years ago. That pretty much eliminates my peripheral vision, but that
doesn't bother me - I'd much rather turn my head and actively look for
traffic than wait for it to appear somewhere in the corner of my eye.

What I don't do (and I tried) is use contacts when flying. Contacts
move around. Weighted lenses are self-correcting, not fixed. Which
means that they will move, often exactly when you need perfect vision,
and slowly get back into proper place and orienatation over next 30
seconds or more. That's not acceptable to me. Another problem is that
eyes get drier at higher altitudes - wetting them makes lenses even
less stable.

I talked to two Lasik surgeons and decided against it (at least for
now). When I asked about my chance of ending up with vision worse than
what I have now, the best they could come up with is "chances of
success are much higher than few years back". That's not enough for
me, especially after reviewing this:
http://www.visionsurgeryrehab.org/
I wouldn't be able to fly with some of the problems described there, I
can fly with glasses. I just make sure to always have two spare pairs,
one of them hanging around my neck.

- Tom

On Sep 2, 5:02 pm, Tom L. wrote:
snip

What I don't do (and I tried) is use contacts when flying. Contacts
move around. Weighted lenses are self-correcting, not fixed. Which
means that they will move, often exactly when you need perfect vision,
and slowly get back into proper place and orientation over next 30
seconds or more.

The reason I'm ok with this is that even when my vision isn't perfect,
it's definitely good enough to function, it's more of as hassle than
anything else. But the headaches from the uncorrected astigmatism?
No thanks. Funny thing is, I've talked to people who have NO issues
with weighted lenses - wish I was one of them.

That's not enough for
me, especially after reviewing this:http://www.visionsurgeryrehab.org/
I wouldn't be able to fly with some of the problems described there, I
can fly with glasses.

Yikes.

Strikes PRK from the list of options.

Third opinion scheduled in a few weeks. Hopefully I can get this
solved and hang onto my medical. Really appreciate everyone's
thoughts on this.

"Emily" wrote

Yikes.

Strikes PRK from the list of options.

No doubt. I have not seen that any of the corrective options are 100% safe,
so until then, I LOVE my glasses. g

Well, perhaps that is too strong, but I love them compared to having my
vision ruined!
Third opinion scheduled in a few weeks. Hopefully I can get this
solved and hang onto my medical. Really appreciate everyone's
thoughts on this.

What was that third option, or didn't you say what it was, 'cause I couldn't
find it!
--
Jim in NC