The Real Bev <bashley101+usenet[at]gmail.com> wrote in
news:9V1_k.3858$tr1.3213[at]newsfe05.iad:

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I'm not really sure. I've only owned cheapos; the only ones that I have
been able to afford when it comes time for new lenses, so they are the only
ones that I can personally comment on.


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I didn't have any specific features in mind when I said that. I was just
referring to the typical progression of technology over the passage of
time.

In article <9V1_k.3858$tr1.3213[at]newsfe05.iad> ,
The Real Bev <bashley101+usenet[at]gmail.com> wrote:

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How much are people willing to pay for bragging quality glasses?

Bill

--
Private Profit; Public Poop! Avoid collateral windfall!

ShadowTek wrote:

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Assuming you don't get extra coatings or extra-thin lenses, what actual
quality differences between cheap and expensive CR-39 lenses are there?

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How are they different now?

--
Cheers, Bev
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
The early bird gets the worm, the second mouse gets the cheese.

"Salmon Egg" <SalmonEgg[at]sbcglobal.net> wrote

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I did it this way and I did it that way. This way made more people happy.

-MT

On Dec 2, 7:20*pm, Michael <msurt...[at]gmail.com> wrote:
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I think that you are hyperopic and your eye doc prescribed your
distance correction to be used as readers.

People who are hyperopic can see clearly at distance by flexing a
muscle inside the eye that controls the lens. This is the muscle that
is also used to focus at near. At about age 38 to 45, the lens loses
it's flexability and it becomes harder to read. At age 42, you likely
have enough flex left to clear your distance vision without glasses
but not at near, in efffect you "use up" your near flex room to clear
the distance. By wearing glasses to correct the distance vision, you
then free up flex to clear near.

Since you have been flexing that lens for distance for the past 42
years, you continue to do so even with the glasses which is why the TV
is blurry with glasses. As you look at it, your visual system relaxes
and the TV becomes clear.

At this point you can suit yourself, wear the glasses just for near or
wear all the time. In another year or two you will find that you need
them for distance. This is not the glasses making things worse, just
the normal age related change that would occur whether glasses are
worn or not.

Judy

"Mark A" <someone[at]someone.com> wrote in
news:2pFZk.3497$UI2.3151[at]bignews6.bellsouth.net:

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I expect that that are also others who didn't have the money to spend on
"high quality" lenses at the time of purchase, which means that it is an
issue for some people. Also, this being his first pair of glasses, he may
not have know what kind of lenses would be best to buy, so he may have
bought a cheaper pair like mine.

Although, the bottom-of-the-line model is likely to be better than it was
when I last bought lenses.

In article <2NOdnYBcsc3hb6rUnZ2dnUVZ_vWdnZ2d[at]giganews.com> ,
"Mike Tyner" <mtyner[at]mindspring.com> wrote:

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It appears to me that whether or not accommodative effort is minimized
or encouraged is a relatively minor problem compared to all the bad
things that could happen to one's vision. My guess is that there is
little evidence to say one way or the other is definitively a better
approach. I mae the further guess that there is some "We always did it
this way" creeping in.

Bill

--
Private Profit; Public Poop! Avoid collateral windfall!

"Salmon Egg" <SalmonEgg[at]sbcglobal.net> wrote

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Good question. First answer: every quarter of add power increases the blur
at your feet. Unlike natural accommodation, you can't relax away that blur.

At 42, you've only lost a diopter or so of natural ability, and it's pretty
disruptive to add back +2.50 of blur to make up for it, just because you'll
"need it one day."

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"Minimizing effort" sounds good but normal accommodation is effortless and
we can't assume that all accommodation is bad. Match the degree of
assistance to the degree of the problem.

Then we deduct a quarter diopter, for the sake of the market^H^H^H for
comfort.

-MT

On Dec 2, 7:20*pm, Michael <msurt...[at]gmail.com> wrote:
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your observations are totally as would be expected for an early
presbyope or early hyperope. just use the glasses when you are doing
near tasks (reading, computer, etc) and forget about them otherwise.
as you get older you may find that they don't adversely affect your
distance vision at all when you first put them on. you are
experiencing normal physiological changes in the lens and ciliary
muscle portions of your eye and it occurs to ALL humans at around your
age. read about presbyopia.

"ShadowTek" <ShadowTek[at]fake.email> wrote in message
news:Xns9B69BD257CCADShadowTekfakeemail[at]85.214.105.209...
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Then what do you expect?