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Home > Archive > Vision > November 2004 > Aspheric lenses relatively new?
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Aspheric lenses relatively new?
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| Fred Ma 2004-11-02, 4:07 am |
| Are aspheric lenses relatively new on the mass consumer
market? Expertise on fitting such lenses seem to be
less than that of spherical lenses.
Fred
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| Robert Martellaro 2004-11-02, 7:12 pm |
| On 2 Nov 2004 09:00:54 GMT, Fred Ma <fma@doe.carleton.ca> wrote:
>Are aspheric lenses relatively new on the mass consumer
>market? Expertise on fitting such lenses seem to be
>less than that of spherical lenses.
>
>Fred
Fred,
Asheric lenses were commonly used in eyeglasses following cataract surgery in
the 1950s. When IOLs became available in the 1970s the market for aspherics was
substantially reduced. The next aspheric lens to hit the market was from
Rodenstock in the early 1990s, with Sola following suit in the mid 1990s. In the
late 1990s Optima and Sola introduced atoric lenses, an advanced aspheric design
that was of benefit to astigmats and moderate to high myopes.
Hope this helps
Robert Martellaro
~~~~~~~~~~~~~~~~~~
Optician/Owner
Roberts Optical
robopt@execpc.com
~~~~~~~~~~~~~~~~~~
"Science is a way of trying not to fool yourself."
- Richard Feynman
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| Fred Ma 2004-11-02, 7:12 pm |
| Robert Martellaro wrote:
>On 2 Nov 2004 09:00:54 GMT, Fred Ma <fma@doe.carleton.ca> wrote:
>
>
>
>
>Asheric lenses were commonly used in eyeglasses following cataract surgery in
>the 1950s. When IOLs became available in the 1970s the market for aspherics was
>substantially reduced. The next aspheric lens to hit the market was from
>Rodenstock in the early 1990s, with Sola following suit in the mid 1990s. In the
>late 1990s Optima and Sola introduced atoric lenses, an advanced aspheric design
>that was of benefit to astigmats and moderate to high myopes.
>
Yes, my googling showed questions dating about 10 years back. Then
again, that's
when the internet exploded, so it may not necessarily reflect the advent of
aspherics on the mass market. Thanks for confirming this time frame. I
would
imagine that a decade is enough time for experience to develop in
fitting them.
I guess they are just sensitive to position.
Fred
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| Robert Martellaro 2004-11-08, 4:07 am |
| On 2 Nov 2004 09:00:54 GMT, Fred Ma <fma@doe.carleton.ca> wrote:
>Are aspheric lenses relatively new on the mass consumer
>market? Expertise on fitting such lenses seem to be
>less than that of spherical lenses.
>
>Fred
Fred,
Asheric lenses were commonly used in eyeglasses following cataract surgery in
the 1950s. When IOLs became available in the 1970s the market for aspherics was
substantially reduced. The next aspheric lens to hit the market was from
Rodenstock in the early 1990s, with Sola following suit in the mid 1990s. In the
late 1990s Optima and Sola introduced atoric lenses, an advanced aspheric design
that was of benefit to astigmats and moderate to high myopes.
Hope this helps
Robert Martellaro
~~~~~~~~~~~~~~~~~~
Optician/Owner
Roberts Optical
robopt@execpc.com
~~~~~~~~~~~~~~~~~~
"Science is a way of trying not to fool yourself."
- Richard Feynman
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