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dkjk@bigpond.net.au
medicine forum beginner
Joined: 04 Jul 2006
Posts: 4
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 Posted: Tue Jul 04, 2006 12:39 pm Post subject:
Choice of lenses
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Hi group,
I apologise if this gets asked all the time, but I'd like to get an
objective opinion on the appropriate lenses for the new frames I'm
buying from giarre.com. The prices may seem a little steep due the the
crap Australian dollar. Here is my prescription (Right followed by
Left)
Sphere: -2.00, -2.00
Cylinder: -0.75, -0.75
Axis: 110, 85
PD: 58 mm / Monocular R 29mm, L 29mm
Thanks very much in advance,
James
Hard resin lens (CR39) FREE- Standard
Single-Vision - 0-Hard resin (CR39)
It's a monofocal standard material (designed spherical). CR 39 is
undoubtedly the most common optical polymer in the ophthalmic field. It
is a heat hardening resin and as such it is not attacked by any
chemical agent. It has a higher scratch resistance than the other
plastic materials. The specific weight is 1.3 versus 2.53 of glass and
this means that, with the same thickness, the weight of a CR 39 lens is
approximately 48% lighter than a similar one made of glass.
UV protection (nm): 340 - UVB Absorption: 100 - UVA Absorption: 87
[ Antireflective coating: NO - Antiscratch coating: NO ]
0.00 AUD
Polycarbonate 1.59 - Premium (SMSE)
Single-Vision - Polycarbonate
Polycarbonate lenses are not only thinner and lighter in weight than
traditional plastic eyeglass lenses, they also offer ultraviolet (UV)
protection and scratch resistance. In addition, they are very impact
resistant. This extra toughness makes them the lenses of choice for
children's glasses, sports eyewear and safety glasses.
UV protection (nm): 385 - UVB Absorption: 100 - UVA Absorption: 100
[ Antireflective coating: YES - Antiscratch coating: YES ]
78.94 AUD
NULUX PNX 1.53 Hi-Vision
Hoya - Mid-high index
PNX (TRIVEX) is a new optical material like as policarbonate; designed
for everyday use, and for those who demand a little more from their
lenses. Ideal for outdoor activities and for children, PNX offers
exceptional performance and reliability. - High-impact resistance,
strong and safe - High tensile strength, elastic and reliable -
Extremely lightweight. With anti-reflection layer
UV protection (nm): 395 - UVB Absorption: 100 - UVA Absorption: 100
[ Antireflective coating: YES - Antiscratch coating: YES ]
126.78 AUD
Airwear 1.59 Crizal
Essilor - Polycarbonate
For people who rely on their spectacles for daily use, having the right
lens is paramount. The lenses must be comfortable yet robust enough to
cope with all daily activities, from sport right through to driving!
Airwear lenses offer so many benefits to wearers that almost anyone is
a candidate - whatever they do.
UV protection (nm): 385 - UVB Absorption: 100 - UVA Absorption: 100
[ Antireflective coating: YES - Antiscratch coating: YES ]
157.07 AUD
Orma Transitions Next Generation Supra Brown
Essilor - Mid-high index
Essilor Transitions has always been a high performance lens,and over
the years this performance has continued to evolve. Not only in terms
of speed of reaction but also in terms of the availability of lens
materials. With previous generations of Transitio
UV protection (nm): 390 - UVB Absorption: 100 - UVA Absorption: 100
[ Antireflective coating: NO - Antiscratch coating: YES ]
172.22 AUD
Airwear Aspheric 1.59 Crizal
Essilor - Polycarbonate
For people who rely on their spectacles for daily use, having the right
lens is paramount. The lenses must be comfortable yet robust enough to
cope with all daily activities, from sport right through to driving!
Airwear lenses offer so many benefits to wearers that almost anyone is
a candidate - whatever they do.
UV protection (nm): 385 - UVB Absorption: 100 - UVA Absorption: 100
[ Antireflective coating: YES - Antiscratch coating: YES ]
183.39 AUD
Polycarbonate Aspheric 1.59 - Premium (SMSR)
Single-Vision - Polycarbonate
Aspheric (superior optics): A basic principle of optics dictates that a
slight distortion is created when wearers look away from the center of
a conventional lens, whether the gaze is directed to the left or right,
above or below. Aspheric lens designs reduce or eliminate such
distortions. This is because, as the eye travels away from the center
of the lens, the front curve changes, keeping the optics crisp and
clear. This is why all expensive camera lenses feature aspheric curves.
UV protection (nm): 385 - UVB Absorption: 100 - UVA Absorption: 100
[ Antireflective coating: YES - Antiscratch coating: YES ]
197.74 AUD
Photochromic 1.5 Transitions V - Premium (HVRI)
Single-Vision - Mid-high index
Photochromic lenses: the intensity of colour changes according to the
level of sunlight, becoming darker in bright conditions and fading to
clear in darker conditions. This means that it is an intelligent
photochromic lens and can be worn throughout the day, with no need to
switch to and from regular sunglasses. The colours are carefully
selected for increasing contrast and to most effectively eliminate the
blinding effects of the sun.
UV protection (nm): 340 - UVB Absorption: 100 - UVA Absorption: 100
[ Antireflective coating: YES - Antiscratch coating: YES ]
226.44 AUD
Polycarbonate 1.59 Transition NG Grey (STSR)
Single-Vision - Polycarbonate
Photochromic lenses: the intensity of colour changes according to the
level of sunlight, becoming darker in bright conditions and fading to
clear in darker conditions. This means that it is an intelligent
photochromic lens and can be worn throughout the day, with no need to
switch to and from regular sunglasses. The colours are carefully
selected for increasing contrast and to most effectively eliminate the
blinding effects of the sun.
UV protection (nm): 385 - UVB Absorption: 100 - UVA Absorption: 100
[ Antireflective coating: NO - Antiscratch coating: YES ]
301.39 AUD |
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Mark A
medicine forum Guru Wannabe
Joined: 30 Apr 2005
Posts: 226
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| Posted: Tue Jul 04, 2006 5:36 pm Post subject:
Re: Choice of lenses
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<dkjk@bigpond.net.au> wrote in message
news:1152016765.529883.137190@p79g2000cwp.googlegroups.com...
| Quote: | Hi group,
I apologise if this gets asked all the time, but I'd like to get an
objective opinion on the appropriate lenses for the new frames I'm
buying from giarre.com. The prices may seem a little steep due the the
crap Australian dollar. Here is my prescription (Right followed by
Left)
Sphere: -2.00, -2.00
Cylinder: -0.75, -0.75
Axis: 110, 85
PD: 58 mm / Monocular R 29mm, L 29mm
Thanks very much in advance,
James
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Avoid the various polycarbonate lenses listed. For your mild Rx, the free
Hard Resin (CR-39) should work fine and will provide the best optical
quality of any of the materials listed.
If you need safety glasses (you wear them during contact sports or in an
industrial/lab environment) or want something a little lighter, then get the
Hoya Trivex (NULUX PNX 1.53 Hi-Vision). |
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Anon E. Muss
medicine forum Guru Wannabe
Joined: 22 May 2006
Posts: 136
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| Posted: Tue Jul 04, 2006 8:49 pm Post subject:
Re: Choice of lenses
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On 4 Jul 2006 05:39:25 -0700, dkjk@bigpond.net.au wrote:
| Quote: | Hi group,
I apologise if this gets asked all the time, but I'd like to get an
objective opinion on the appropriate lenses for the new frames I'm
buying from giarre.com. The prices may seem a little steep due the the
crap Australian dollar. Here is my prescription (Right followed by
Left)
Sphere: -2.00, -2.00
Cylinder: -0.75, -0.75
Axis: 110, 85
PD: 58 mm / Monocular R 29mm, L 29mm
Thanks very much in advance,
|
[snip]
Not enough information given to make a definite recommendation,
however the following information may help:
I am not a big fan of polycarbonate. In almost every case, TRIVEX is
a better option. The reasons for this have been discussed a lot here
in the past.
If both eyes were -0.75DS -0.75DC, then my recommendations would be
CR-39 if placed into a metal or zyl frame worn under normal everyday
wear. If placed into a rimlon or rimless frame, if you were <18, or
they are going to be worn where increased impact resistance is needed,
then I would go with TRIVEX.
Because the two lens powers are quite a bit different, I would tend to
go with high-index 1.67 aspheric plastic to make the lenses look more
alike and cosmetically pleasing (especially if fit into a metal,
rimless or rimlon frame). I would recommend an A/R coat and go over
the pros/cons of transitions lenses (I like transitions lenses on all
my glasses). However, if the lenses are fit into a smaller roundish
zyl frame with the eyes centered, then TRIVEX would probably look
great too.
Of all the options you listed (snipped), I believe the TRIVEX option
would be the one I would choose. |
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Mark A
medicine forum Guru Wannabe
Joined: 30 Apr 2005
Posts: 226
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| Posted: Tue Jul 04, 2006 9:29 pm Post subject:
Re: Choice of lenses
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| Quote: | On 4 Jul 2006 05:39:25 -0700, dkjk@bigpond.net.au wrote:
Here is my prescription (Right followed by Left)
Sphere: -2.00, -2.00
Cylinder: -0.75, -0.75
Axis: 110, 85
PD: 58 mm / Monocular R 29mm, L 29mm
"Anon E. Muss" <anonymous@example.org> wrote in message ...
[snip]
Not enough information given to make a definite recommendation,
however the following information may help:
I am not a big fan of polycarbonate. In almost every case, TRIVEX is
a better option. The reasons for this have been discussed a lot here
in the past.
If both eyes were -0.75DS -0.75DC, then my recommendations would be
CR-39 if placed into a metal or zyl frame worn under normal everyday
wear. If placed into a rimlon or rimless frame, if you were <18, or
they are going to be worn where increased impact resistance is needed,
then I would go with TRIVEX.
Because the two lens powers are quite a bit different, I would tend to
go with high-index 1.67 aspheric plastic to make the lenses look more
alike and cosmetically pleasing (especially if fit into a metal,
rimless or rimlon frame). I would recommend an A/R coat and go over
the pros/cons of transitions lenses (I like transitions lenses on all
my glasses). However, if the lenses are fit into a smaller roundish
zyl frame with the eyes centered, then TRIVEX would probably look
great too.
Of all the options you listed (snipped), I believe the TRIVEX option
would be the one I would choose.
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I think you are misreading the Rx from the consumer. If you read the post
carefully, the Rx is the same in both eyes (except for axis degrees). I
think this is the format you are used to:
OD -2.00 -0.75 110
OS -2.00 -0.75 85 |
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Anon E. Muss
medicine forum Guru Wannabe
Joined: 22 May 2006
Posts: 136
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| Posted: Tue Jul 04, 2006 10:00 pm Post subject:
Re: Choice of lenses
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On Tue, 4 Jul 2006 15:29:04 -0600, "Mark A" <nobody@nowhere.com>
wrote:
| Quote: | I think you are misreading the Rx from the consumer. If you read the post
carefully, the Rx is the same in both eyes (except for axis degrees). I
think this is the format you are used to:
OD -2.00 -0.75 110
OS -2.00 -0.75 85
|
You are right. Thanks for the heads up:
In this case, if one kept the eyesize of the frame small/round and the
eyes were well centered, then my advice would be as I indicated in the
previous follow-up article:
"my recommendations would be CR-39 if placed into a metal or
zyl frame worn under normal everyday wear. If placed into a
rimlon or rimless frame, if you were <18, or they are going to
be worn where increased impact resistance is needed, then I
would go with TRIVEX."
I rarely recommend going with the higher index plastics such as 1.67
with prescriptions < -3.00 unless it is in a rimless or rimlon frame
with a lens design/option that I cannot get in TRIVEX (e.g., Varilux
Panamic, Crizal Alize A/R coat) or unless it is being placed into a
large frame. |
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dkjk@bigpond.net.au
medicine forum beginner
Joined: 04 Jul 2006
Posts: 4
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| Posted: Wed Jul 05, 2006 4:27 am Post subject:
Re: Choice of lenses
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Thankyou all for your advice! I think I will be cheap and go with the
CR39 :)
Oh, and sorry about the confusion.
Thanks again.
James |
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Mark A
medicine forum Guru Wannabe
Joined: 30 Apr 2005
Posts: 226
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| Posted: Wed Jul 05, 2006 4:28 am Post subject:
Re: Choice of lenses
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<dkjk@bigpond.net.au> wrote in message
news:1152073646.093845.148570@m79g2000cwm.googlegroups.com...
| Quote: | Thankyou all for your advice! I think I will be cheap and go with the
CR39 :)
Oh, and sorry about the confusion.
Thanks again.
James
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The "confusion" was not your fault. |
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dkjk@bigpond.net.au
medicine forum beginner
Joined: 04 Jul 2006
Posts: 4
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| Posted: Wed Jul 05, 2006 4:59 am Post subject:
Re: Choice of lenses
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On reflection, due you think it would be a better idea to get lenses
with 100 % UV protection---as opposed to the 85 % offered by CR39.
Also, isn't the anti-reflective coating rather important?
Thanks.
James |
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Anon E. Moose
medicine forum beginner
Joined: 17 Jun 2006
Posts: 4
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| Posted: Wed Jul 05, 2006 5:30 am Post subject:
Re: Choice of lenses
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On 4 Jul 2006 21:59:01 -0700, dkjk@bigpond.net.au wrote:
| Quote: | On reflection, due you think it would be a better idea to get lenses
with 100 % UV protection---as opposed to the 85 % offered by CR39.
|
If I was wearing glasses outside, I would get UV protection.
| Quote: | Also, isn't the anti-reflective coating rather important?
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I recommend A/R coating on all lenses too as long as you are able to
take care of them properly. |
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dkjk@bigpond.net.au
medicine forum beginner
Joined: 04 Jul 2006
Posts: 4
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| Posted: Wed Jul 05, 2006 5:51 am Post subject:
Re: Choice of lenses
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Anon E. Moose wrote:
| Quote: | On 4 Jul 2006 21:59:01 -0700, dkjk@bigpond.net.au wrote:
On reflection, due you think it would be a better idea to get lenses
with 100 % UV protection---as opposed to the 85 % offered by CR39.
If I was wearing glasses outside, I would get UV protection.
Also, isn't the anti-reflective coating rather important?
I recommend A/R coating on all lenses too as long as you are able to
take care of them properly.
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What do you think of CR39 with Crizial Alize A/R coating and UV
protection?
James |
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JohnDoe
medicine forum Guru
Joined: 14 Jun 2005
Posts: 364
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| Posted: Wed Jul 05, 2006 1:13 pm Post subject:
Re: Choice of lenses
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dkjk@bigpond.net.au wrote:
| Quote: | Anon E. Moose wrote:
On 4 Jul 2006 21:59:01 -0700, dkjk@bigpond.net.au wrote:
On reflection, due you think it would be a better idea to get lenses
with 100 % UV protection---as opposed to the 85 % offered by CR39.
If I was wearing glasses outside, I would get UV protection.
Also, isn't the anti-reflective coating rather important?
I recommend A/R coating on all lenses too as long as you are able to
take care of them properly.
What do you think of CR39 with Crizial Alize A/R coating and UV
protection?
James
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Crizal Alize is very good ... as long as you keep your lenses clean &
fingerprint-free. I believe multicoats (i.e. Crizal Alize coating) have
inbuilt UV protection so UV is not required as a separate coating.
I agree that CR39 would be fine for your prescription strength.
Dom |
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Dick Adams
medicine forum Guru
Joined: 12 Oct 2005
Posts: 300
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| Posted: Wed Jul 05, 2006 2:19 pm Post subject:
Re: Choice of lenses
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"Dom" <dont@spam.me> wrote in message news:44ABBAE9.8020603@spam.me...
| Quote: | dkjk@bigpond.net.au wrote:
Crizal Alize is very good ... as long as you keep your lenses clean &
fingerprint-free. I believe multicoats (i.e. Crizal Alize coating) have
inbuilt UV protection so UV is not required as a separate coating.
I agree that CR39 would be fine for your prescription strength.
|
Almost anything would. If you can forego that fancy overcoats, you
can wear generic eyeglasses, and save quite a few bucks.
What is giarre.com? Have you looked at www.zenni.com?
--
Dicky |
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Quick
medicine forum Guru
Joined: 19 Jun 2005
Posts: 343
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| Posted: Wed Jul 05, 2006 7:14 pm Post subject:
Re: Choice of lenses
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Dick Adams wrote:
| Quote: | "Dom" <dont@spam.me> wrote in message
news:44ABBAE9.8020603@spam.me...
dkjk@bigpond.net.au wrote:
Crizal Alize is very good ... as long as you keep your
lenses clean & fingerprint-free. I believe multicoats
(i.e. Crizal Alize coating) have inbuilt UV protection
so UV is not required as a separate coating.
I agree that CR39 would be fine for your prescription
strength.
Almost anything would. If you can forego that fancy
overcoats, you can wear generic eyeglasses, and save
quite a few bucks.
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And if you need home grown saline (carefully cultured and
aged in a dark closet) Dicky will sell it to you for next to nothing.
-Quick |
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