v for frequency?...

[rbowman]

On Mon, 24 Apr 2023 16:33:54 -0700, John Larkin wrote:

I have a macular hole in one eye too. My doc did a retinal peel and it
improved some. Did your macular hole fully heal? I have a bit of
residual blind spot.

I wouldn\'t say a blind spot as much as a little distortion. If I look at
an Amsler grid some of the squares aren\'t. In a scope reticle the cross
hairs are a little curvy but nothing is missing. It\'s nothing like the
bottom illustration,

https://www.aao.org/eye-health/tips-prevention/facts-about-amsler-grid-
daily-vision-test

The same eye had a few tack welds prior to the surgery. The shrinking
vitreous fluid resulted in a little bleeding. that was a little scary
since I suddenly had floaters looking like green dragons. During the
surgery he added a few more welds and got rid of the dragons at least.

The surgery itself wasn\'t bad. However my collar bone and shoulder blade
have had a hard life and laying back in a dentist chair gets painful after
a while. At least with the dentist I can move a little. That memory is why
I\'m reluctant to do the cataract although it\'s a much faster procedure and
shouldn\'t be a problem. At least that doesn\'t require the three days face
down. After that I backed into a snow drift with zero depth perception as
the gas was absorbed.

 

[Peeler]

On 24 Apr 2023 22:55:23 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:

I had macular hole surgery a few years back on my dominant eye and the
sulfur hexafluoride gas tends to hasten cataract formation.

lowbrowwoman, the trumptard, is emulating his idol, the Orange Clown, again!
I.e. talking about HIMSELF, the most interesting person in the world!
Fucking stupid disturbed Yankee losers! LOL

--
Yet another thrilling account from the resident senile superhero\'s senile
life:
\"I went to a Driveby Truckers concert at a local venue and they made me
leave my knife in the car. Never went back. Come to think of it the Truckers
had a Black Lives Matter banner. Never bought any of their music again
either.\"
MID: <k84ip9Fesb1U1@mid.individual.net>

 

[Peeler]

On 25 Apr 2023 02:24:49 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:

> I wouldn\'t say a blind spot as much as a little distortion.

Everything \"little\" you always compensate with your big mouth, bigmouth!

<FLUSH another load of idiotic senile crap unread>

--
More absolutely idiotic blather by the resident senile gossip:
\"My mother sometimes made a cherry chiffon cake that started with a
packaged mix. It wasn\'t bad if you squished a slice down to resemble real
cake.\"
MID: <kaldt8F22l6U12@mid.individual.net>

 

[Peeler]

On 24 Apr 2023 22:42:39 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:

https://en.wikipedia.org/wiki/Ketchup_as_a_vegetable

\"Critics demonstrated outrage in Congress and in the media against the
Ronald Reagan administration for cutting school lunch budgets and allowing
ketchup and other condiments to count as vegetables.\"

You miserable useless creature STILL lying about you holding down a job, you
pathological senile gossip? LOL

--
Yet more of the abnormal senile gossiping by the resident senile gossip:
\"I never understood how they made a living but the space where the local
party store was is now up for lease. It probably was more than helium. I
often walk over the the adjacent market to get something for dinner and
people stuffing balloons in their cars was a common sight. No more. I\'ve
no idea if there is another store in town.\"
MID: <kafs2nF6vi1U15@mid.individual.net>

 

[John Larkin]

On 24 Apr 2023 16:25:05 GMT, rbowman <bowman@montana.com> wrote:

On Mon, 24 Apr 2023 09:58:22 +0100, The Natural Philosopher wrote:

On 24/04/2023 03:57, rbowman wrote:
I don\'t know about Tennyson but i doubt Vachel Lindsay gets read in
grade school anymore. Too bad; Lindsay had rhythm.
There was an ancient mariner And he stoppeth one of three...

Water, water everywhere nor any drop to drink.

That was a high school memorization task. Coleridge was better after a
dose of laudanum. In the US the only thing available at the time was
camphorated tincture of opium, aka paregoric. It was difficult to choke
down enough to get into the mood.

A college elective was \'Romanticism and Realism\', with the first semester
being Romanticism. It was much better in the second semester. It may have
had something to do with the professor who taught the Romanticism section
having made his life\'s work \'The Faerie Queene\'.

There are legions of people who need things to keep them occupied,
lest they make trouble for the productive people.

 

[Max Demian]

On 24/04/2023 23:55, rbowman wrote:

On Mon, 24 Apr 2023 16:38:43 +0100, Martin Brown wrote:

Usually you have one eye that is dominant so modest errors in the other
one don\'t show. You will have a headache though if a lens falls out.

Both eyes is always marginally better than either one on its own but the
dominant eye gets the lions share of attention on seeing fine detail.
Binocular vision is handy for judging distances though.

I had macular hole surgery a few years back on my dominant eye and the
sulfur hexafluoride gas tends to hasten cataract formation. I\'ve been
kicking the cataract surgery can down the road so my dominant eye is also
the less functional one. That leads to some interesting visual effects.

What do they use the sulphur hexafluoride for?

It\'s a dense gas which, when breathed, reduces the resonant frequency of
the vocal cavities. Kind of the opposite to helium. I\'ve often thought
that, if breathed by a prepubescent boy, he could sing like a castrato
without any surgery needed. \"Viva la morte col coltello!\"

--
Max Demian

 

[rbowman]

On Tue, 25 Apr 2023 15:35:18 +0100, Max Demian wrote:

On 24/04/2023 23:55, rbowman wrote:
On Mon, 24 Apr 2023 16:38:43 +0100, Martin Brown wrote:

Usually you have one eye that is dominant so modest errors in the
other one don\'t show. You will have a headache though if a lens falls
out.

Both eyes is always marginally better than either one on its own but
the dominant eye gets the lions share of attention on seeing fine
detail. Binocular vision is handy for judging distances though.

I had macular hole surgery a few years back on my dominant eye and the
sulfur hexafluoride gas tends to hasten cataract formation. I\'ve been
kicking the cataract surgery can down the road so my dominant eye is
also the less functional one. That leads to some interesting visual
effects.

What do they use the sulphur hexafluoride for?

The vitreous fluid is removed from the eye during the procedure. The gas
is used to inflate the eye and hold the retina in position while the
vitreous fluid regenerates.

It gets a bit strange during that phase. The image on the retina is upside
down like in a camera; the brain inverts it. So, as the fluid replaces the
gas it\'s filling in from the bottom but what you see is a band of vision
on top of what looks like one of those photos taken with a camera
partially underwater. It\'s hard to explain.

 

[Peeler]

On 25 Apr 2023 16:41:18 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:

The vitreous fluid is removed from the eye during the procedure. The gas
is used to inflate the eye and hold the retina in position while the
vitreous fluid regenerates.

I\'m sure everyone in sci.electronics.design, alt.home.repair and uk.d-i-y
will be pleased to learn about this, you bigmouthed trolling piece of senile
Yankee shit!

--
More of the senile gossip\'s absolutely idiotic senile blather:
\"I stopped for breakfast at a diner in Virginia when the state didn\'t do
DST. I remarked on the time difference and the crusty old waitress said
\'We keep God\'s time in Virginia.\'

I also lived in Ft. Wayne for a while.\"

MID: <t0tjfa$6r5$1@dont-email.me>

 

[John Larkin]

On 25 Apr 2023 16:41:18 GMT, rbowman <bowman@montana.com> wrote:

On Tue, 25 Apr 2023 15:35:18 +0100, Max Demian wrote:

On 24/04/2023 23:55, rbowman wrote:
On Mon, 24 Apr 2023 16:38:43 +0100, Martin Brown wrote:

Usually you have one eye that is dominant so modest errors in the
other one don\'t show. You will have a headache though if a lens falls
out.

Both eyes is always marginally better than either one on its own but
the dominant eye gets the lions share of attention on seeing fine
detail. Binocular vision is handy for judging distances though.

I had macular hole surgery a few years back on my dominant eye and the
sulfur hexafluoride gas tends to hasten cataract formation. I\'ve been
kicking the cataract surgery can down the road so my dominant eye is
also the less functional one. That leads to some interesting visual
effects.

What do they use the sulphur hexafluoride for?

The vitreous fluid is removed from the eye during the procedure. The gas
is used to inflate the eye and hold the retina in position while the
vitreous fluid regenerates.

It gets a bit strange during that phase. The image on the retina is upside
down like in a camera; the brain inverts it. So, as the fluid replaces the
gas it\'s filling in from the bottom but what you see is a band of vision
on top of what looks like one of those photos taken with a camera
partially underwater. It\'s hard to explain.

It was very weird, totally blurred initially and then like looking
through the porthole of a sinking ship. It took me about two months
for the final bubbles to go away.

The refill fluid is liquid, no collagen, so it won\'t tear bits off
your retina like the original rigid gel can. My floaters are gone now,
too.

I think the collagen is part of an oxygen diffusion barrier between
the retina and the lens. The retina is the most oxygenated part of
your body and the lens doesn\'t like a lot of oxygen.

My doctor used disulfur hexafluoride. Previously he used to use freon.

 

[Ralph Mowery]

In article <k8gd4i9dmfqcq4t7rpb0n8c2ekjfaj1d0r@4ax.com>,
jlarkin@highlandSNIPMEtechnology.com says...

Zenni works for me. I have a regular bifocal pair and one set up for
reading/computer. Bifocal where one is about a foot away and the other
takes over around 2 feet for working with the computer.


Are both positive, magnifiers?

When I had cataract surgery, I elected to stay nearsighted. 17\" FL in
one eye for computing, 12\" in the other for reading.

I don\'t know what they are. I just told the eye doctor what I wanted
and he gave me the numbers to send Zenni.
All I know is the results. The bottom lense works well from a few
inches to about a foot and the upper lense works from about a foot to
about 3 feet. Each eye is a different set of numbers.

 

[Max Demian]

On 24/04/2023 23:55, rbowman wrote:

On Mon, 24 Apr 2023 16:38:43 +0100, Martin Brown wrote:

Usually you have one eye that is dominant so modest errors in the other
one don\'t show. You will have a headache though if a lens falls out.

Both eyes is always marginally better than either one on its own but the
dominant eye gets the lions share of attention on seeing fine detail.
Binocular vision is handy for judging distances though.

I had macular hole surgery a few years back on my dominant eye and the
sulfur hexafluoride gas tends to hasten cataract formation. I\'ve been
kicking the cataract surgery can down the road so my dominant eye is also
the less functional one. That leads to some interesting visual effects.

Did you experience \"floaters\" prior to the retinal damage? That\'s
supposed to be a symptom; I had floaters in one eye a few months ago but
they\'ve mostly gone away now. I see an ophthalmologist once a year in
any case as I might develop glaucoma one day.

--
Max Demian

 

[Martin Brown]

On 24/04/2023 17:51, John Larkin wrote:

On Mon, 24 Apr 2023 16:38:43 +0100, Martin Brown
\'\'\'newspam\'\'\'@nonad.co.uk> wrote:

On 24/04/2023 14:43, John Larkin wrote:
On Mon, 24 Apr 2023 15:14:47 +1000, \"Rod Speed\"
rod.speed.aaa@gmail.com> wrote:

On Mon, 24 Apr 2023 04:31:11 +1000, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:

On 23 Apr 2023 18:21:42 GMT, rbowman <bowman@montana.com> wrote:


My first go-around with the optical department was interesting. She
quoted
a price and I started questioning. \"Those are transition lenses?\"
\"Progressive lenses?\" The prices was less than half of what I\'d paid for
the previous pair.

Zenni glasses are great and maybe 1/10 the price of a regular optical
shop.

Yep, all of mine have been theirs with no regrets with any of them.

Mine are all simple lenses tho.

My opthomogolist sends me to an optometrist who writes complex
prescriptions that don\'t work. They optimize corrections for each eye
and forget that I use two eyes together most of the time.

Usually you have one eye that is dominant so modest errors in the other
one don\'t show. You will have a headache though if a lens falls out.

Both eyes is always marginally better than either one on its own but the
dominant eye gets the lions share of attention on seeing fine detail.
Binocular vision is handy for judging distances though.

Brains do astonishing DSP. Two eyes have much better resolution than
one, and our brains correct all sorts of geometric distortions in real
time.

A fair proportion of it isn\'t the brain so much as the second level
behind the retina. That is where all the processing that sees edges and
fast moving threats in peripheral vision take place. It means you can
react to an incoming threat like an insect flying into your eye and
blink before there would have been time for a round trip.

So I make up my own prescriptions, simple spherical corrections, and
buy them from Zenni.

Provided that you don\'t have much astigmatism then that should work.

I have a lot in one eye but I\'m used to it.

In that case you have to have the prescription made for a particular
working distance or it will be miles off for close up work.

But you really need to find a better optometrist! When mine does me I
can read one line or two lines below what is normally considered 20:20
vision with the full correction applied in his test frames.

My distance vision is to that precise prescription and tack sharp. My
close up are both the previous prescription and more than adequate.

I was slightly horrified to be told that my distance vision was still
within the legal parameters where I could drive without glasses!

California is very sloppy about that. You only need one eye and that
doesn\'t have to be very good.

Here it is a standard car number plate at 20m - not much of a challenge.
(UK number plates the numbers are quite large 79mm 3.1\" high)

--
Martin Brown

 

[Peeler]

On Wed, 26 Apr 2023 11:51:37 +0100, Max Dumbian, the REAL dumb, notorious,
troll-feeding senile idiot, blathered again:

Did you experience \"floaters\" prior to the retinal damage? That\'s
supposed to be a symptom; I had floaters in one eye a few months ago but
they\'ve mostly gone away now. I see an ophthalmologist once a year in
any case as I might develop glaucoma one day.

MORE idiotic senile shit to trash these newsgroups with, you idiotic senile
troll?

 

[John Larkin]

On Wed, 26 Apr 2023 13:25:29 +0100, Martin Brown
<\'\'\'newspam\'\'\'@nonad.co.uk> wrote:

On 24/04/2023 17:51, John Larkin wrote:
On Mon, 24 Apr 2023 16:38:43 +0100, Martin Brown
\'\'\'newspam\'\'\'@nonad.co.uk> wrote:

On 24/04/2023 14:43, John Larkin wrote:
On Mon, 24 Apr 2023 15:14:47 +1000, \"Rod Speed\"
rod.speed.aaa@gmail.com> wrote:

On Mon, 24 Apr 2023 04:31:11 +1000, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:

On 23 Apr 2023 18:21:42 GMT, rbowman <bowman@montana.com> wrote:


My first go-around with the optical department was interesting. She
quoted
a price and I started questioning. \"Those are transition lenses?\"
\"Progressive lenses?\" The prices was less than half of what I\'d paid for
the previous pair.

Zenni glasses are great and maybe 1/10 the price of a regular optical
shop.

Yep, all of mine have been theirs with no regrets with any of them.

Mine are all simple lenses tho.

My opthomogolist sends me to an optometrist who writes complex
prescriptions that don\'t work. They optimize corrections for each eye
and forget that I use two eyes together most of the time.

Usually you have one eye that is dominant so modest errors in the other
one don\'t show. You will have a headache though if a lens falls out.

Both eyes is always marginally better than either one on its own but the
dominant eye gets the lions share of attention on seeing fine detail.
Binocular vision is handy for judging distances though.

Brains do astonishing DSP. Two eyes have much better resolution than
one, and our brains correct all sorts of geometric distortions in real
time.

A fair proportion of it isn\'t the brain so much as the second level
behind the retina. That is where all the processing that sees edges and
fast moving threats in peripheral vision take place. It means you can
react to an incoming threat like an insect flying into your eye and
blink before there would have been time for a round trip.

The brain corrects the signals from two eyes. I can look around
without glasses, and then put them on. Or just look around at odd
angles. In both cases, the two images have different magnifications or
different distortions. Imagine tracking a fly buzzing around your
head, for example. Your brain does multiple focal length and
distortion corrections in real time. Two-eye resolution is markedly
better than one. I think there is dithering and a lot of DSP going on.

The image on your retina surely has gross geometric distortion, but a
good machinist can spot a not-straight line to a fraction of a degree.

After my last eye surgery, my eyes wouldn\'t coordinate. One image was
horribly twisted and zoomed and offset from the other. I could barely
walk. I thought I was doomed. After about a week, things suddenly
snapped into perfect alignment. My brain adjusted.

So I make up my own prescriptions, simple spherical corrections, and
buy them from Zenni.

Provided that you don\'t have much astigmatism then that should work.

I have a lot in one eye but I\'m used to it.

In that case you have to have the prescription made for a particular
working distance or it will be miles off for close up work.

I elected to be nearsighted, so I don\'t use glasses for reading or
computing or close work. I\'m an engineer, not a hunter-gatherer.

I use my Mantis for really close work, and a Mantis is not very
compatible with glasses.

I\'m better off not correcting my astigmatism. I\'ve thrown away two or
three pairs of expensive glasses learning that.

But you really need to find a better optometrist! When mine does me I
can read one line or two lines below what is normally considered 20:20
vision with the full correction applied in his test frames.

My distance vision is to that precise prescription and tack sharp. My
close up are both the previous prescription and more than adequate.

I was slightly horrified to be told that my distance vision was still
within the legal parameters where I could drive without glasses!

California is very sloppy about that. You only need one eye and that
doesn\'t have to be very good.

Here it is a standard car number plate at 20m - not much of a challenge.
(UK number plates the numbers are quite large 79mm 3.1\" high)

 

[John Larkin]

On Wed, 26 Apr 2023 11:51:37 +0100, Max Demian
<max_demian@bigfoot.com> wrote:

On 24/04/2023 23:55, rbowman wrote:
On Mon, 24 Apr 2023 16:38:43 +0100, Martin Brown wrote:

Usually you have one eye that is dominant so modest errors in the other
one don\'t show. You will have a headache though if a lens falls out.

Both eyes is always marginally better than either one on its own but the
dominant eye gets the lions share of attention on seeing fine detail.
Binocular vision is handy for judging distances though.

I had macular hole surgery a few years back on my dominant eye and the
sulfur hexafluoride gas tends to hasten cataract formation. I\'ve been
kicking the cataract surgery can down the road so my dominant eye is also
the less functional one. That leads to some interesting visual effects.

Did you experience \"floaters\" prior to the retinal damage? That\'s
supposed to be a symptom; I had floaters in one eye a few months ago but
they\'ve mostly gone away now. I see an ophthalmologist once a year in
any case as I might develop glaucoma one day.

I\'ve always had floaters. After two vitrectomies, they are mostly
gone, and the big Lego-like structures are all gone.

After I had the last vitrectomy, I had a lot of tiny floaters, little
round dots and, I swear, tadpole swimmers. Repair crew? They are gone
now.

It\'s been interesting.

 

[rbowman]

On Wed, 26 Apr 2023 07:07:18 -0700, John Larkin wrote:

After my last eye surgery, my eyes wouldn\'t coordinate. One image was
horribly twisted and zoomed and offset from the other. I could barely
walk. I thought I was doomed. After about a week, things suddenly
snapped into perfect alignment. My brain adjusted.

I remember an experiment where the subject wore inverting lenses. After a
few days his brain adapted. I think George Stratton was the first
experimental psychologist to try it.

Experimental psychology is quite a bit different to the pap in \'Psychology
Today\'. The Frankfurt School and its descendants have no use for it in
their Critical Theory since it depends on sound scientific technique and
not woo-woo.

 

[rbowman]

On Wed, 26 Apr 2023 07:12:32 -0700, John Larkin wrote:

After I had the last vitrectomy, I had a lot of tiny floaters, little
round dots and, I swear, tadpole swimmers. Repair crew? They are gone
now.

It\'s been interesting.

It\'s only when you swat at them...

 

[rbowman]

On Wed, 26 Apr 2023 11:51:37 +0100, Max Demian wrote:

Did you experience \"floaters\" prior to the retinal damage? That\'s
supposed to be a symptom; I had floaters in one eye a few months ago but
they\'ve mostly gone away now. I see an ophthalmologist once a year in
any case as I might develop glaucoma one day.

Yes. They\'re pretty common and I have one in my left eye that sometimes
masquerades as a mosquito. The onset in my right eye was much more
dramatic due to the blood diffusing in the fluid. It took a few days for
it to settle down to the point where the doctor could see the retina well
enough to do the laser welding.

 

[Peeler]

On 26 Apr 2023 15:18:53 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:

I remember an experiment where the subject wore inverting lenses. After a
few days his brain adapted. I think George Stratton was the first
experimental psychologist to try it.

Experimental psychology is quite a bit different to the pap in \'Psychology
Today\'. The Frankfurt School and its descendants have no use for it in
their Critical Theory since it depends on sound scientific technique and
not woo-woo.

\"The Frankfurt School\"! ROTFLOL What an incurable GRANDILOQUENT BIGMOUTHED
BRAGGART! Well, a TYPICAL Trumptard! LMAO

--
More of the senile gossip\'s absolutely idiotic senile blather:
\"I stopped for breakfast at a diner in Virginia when the state didn\'t do
DST. I remarked on the time difference and the crusty old waitress said
\'We keep God\'s time in Virginia.\'

I also lived in Ft. Wayne for a while.\"

MID: <t0tjfa$6r5$1@dont-email.me>

 

[Peeler]

On 26 Apr 2023 15:40:28 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:

After I had the last vitrectomy, I had a lot of tiny floaters, little
round dots and, I swear, tadpole swimmers. Repair crew? They are gone
now.

It\'s been interesting.

It\'s only when you swat at them...

More of the endless SENILE SHIT in these poor three newsgroups! <tsk>

--
More absolutely idiotic blather by the resident senile gossip:
\"My mother sometimes made a cherry chiffon cake that started with a
packaged mix. It wasn\'t bad if you squished a slice down to resemble real
cake.\"
MID: <kaldt8F22l6U12@mid.individual.net>