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Medical Forum / General / Vision / January 2007How to choose a progressive lens?
I've been wearing progressives for many years and finally ended up with the Varilux Comfort because I was able to adjust to it. However, the poor peripheral vision performance of the lens has made me look further now that I have a new prescription. I am highly astigmatic and the reading section of my lenses has just been altered to +3.25 At first the reading was at +3 and I was given the Definity lens. However, I got headaches and the eye doctor re-did the prescription and moved the reading to 3.25. I could no longer use the Definity lens. Now the Shamir Creation is being recommended. I've looked at the Shamir site and I don't fully understand how to assess whether the Creation, or another kind, would be better for me. I understand the central column, but I don't understand the yellow and green sections that look like footprints :-). I use the glasses mostly for driving, movies, museums and only for reading when I'm out in the world. I have a separate pair of reading glasses for the house and a separate pair of computer/office glasses. How does the Shamir Creation compare to the Definity? Or perhaps the better question, given that my lenses are around $500 and I don't want to make a mistake, how do I figure out what might be best for me? Louise Louise, You're leaving out a lot of information- Rx, visual acuities, eye health- so the best I can do is throw out some educated guesses... >I've been wearing progressives for many years and finally >ended up with the Varilux Comfort because I was able to >adjust to it. However, the poor peripheral vision >performance of the lens has made me look further now that I >have a new prescription. The peripheral blur is probably due to the astigmatism, not the Varilux Comfort design. >I am highly astigmatic and the reading section of my lenses >has just been altered to +3.25 Do you mean the "add for reading/near" is +3.25? If so, that implies that there are some medical problems with your eyes. >At first the reading was at +3 and I was given the Definity >lens. However, I got headaches and the eye doctor re-did >the prescription and moved the reading to 3.25. I could no >longer use the Definity lens. Increasing the add power will increase off-axis blur, general discomfort, and decrease the field of vision at all distances. One might decide to keep the add power in the +2.50 to +2.75 range, especially if you are using separate readers for extended near tasks. >Now the Shamir Creation is being recommended. I've looked >at the Shamir site and I don't fully understand how to >assess whether the Creation, or another kind, would be >better for me. I understand the central column, but I don't >understand the yellow and green sections that look like >footprints :-). Shamir's Autograph lens might be a better option if the astigmatism is more than three diopters. These types of designs incorporate atoric surfaces, increasing the field of clearest vision when there is a considerable amount of astigmatism. >I use the glasses mostly for driving, movies, museums and >only for reading when I'm out in the world. I have a >separate pair of reading glasses for the house and a >separate pair of computer/office glasses. Well, that makes the choice of a +3.25 add extremely suspect for the everyday glasses. Make sure you're comfortable reading at 12" if that's the power they feel is necessary for the readers. >How does the Shamir Creation compare to the Definity? Or >perhaps the better question, given that my lenses are around >$500 and I don't want to make a mistake, how do I figure out >what might be best for me? >Louise The first thing to consider is reducing the add power. That might be enough to make any of the lenses that you've mentioned much more wearable. Either way, if you want an increase in visual refinement and comfort, I'd consider Hoya's ID and Rodenstock's Impression ILT designs. Hope this helps, Robert Martellaro ~~~~~~~~~~~~~~~~~~ Optician/Owner Roberts Optical Wauwatosa Wi. ~~~~~~~~~~~~~~~~~~ "An expert is a person who has made all the mistakes that can be made in a very narrow field." - Niels Bohr > Louise, > [quoted text clipped - 67 lines] > "An expert is a person who has made all the mistakes that can be made in a very narrow field." > - Niels Bohr I'm sorry but the optician has the only copy of the new prescription I'm talking about. However, I do have a prescription from a year ago which would probably provide some of the information: DV OD spherical plano , cylindrical +2.50, axis 85 OS spherical -0.75, cylindrical +3.25, axis 80 ADD OD spherical +2.75 OS +3.00 I have one eye problem I know of: I've had a few accidents over the years and have several abrasions on both corneas. Periodically, these abrasions become irritated and problematic. I'm supposed to use Muro 128 when they are really irritated and lubricating drops such as Systaine during the day. I still have problems at night and often wake up with my eyes burning and irritated. I apologize for not having a copy of the present prescription - I foolishly went directly from the eye doctor to the optometrist and didn't make a copy but I hope the previous prescription can shed some light on the problem. Thanks for your help. Louise > I'm sorry but the optician has the only copy of the new prescription I'm > talking about. However, I do have a prescription from a year ago which [quoted text clipped - 23 lines] > > Louise Call the office who gave you the eye exam and ask for an updated Rx. They are required by law to give it to you. >I'm sorry but the optician has the only copy of the new >prescription I'm talking about. However, I do have a [quoted text clipped - 8 lines] >OD spherical +2.75 >OS +3.00 Just a guess, but it sounds like there's a cataract in the left eye. >I have one eye problem I know of: I've had a few accidents >over the years and have several abrasions on both corneas. [quoted text clipped - 3 lines] >during the day. I still have problems at night and often >wake up with my eyes burning and irritated. Sorry, that can be really uncomfortable. >I apologize for not having a copy of the present >prescription - I foolishly went directly from the eye doctor >to the optometrist and didn't make a copy but I hope the >previous prescription can shed some light on the problem. The old Rx is helpful, but knowing your corrected visual acuities would help to convey how well you see, along with contrast sensitivity testing if applicable. Back to your original question- what's the best PAL for general purpose use with emphasis on the distance vision? Zeiss Gradal Top and Hoya ECP are two of the best in this regard. If you are looking for the most refined lens, especially if the add power can not be reduced, try the Impression (if your outside of the US or ILT in the states), ID (this lens can be optimized for short near focal lengths) or Zeiss Individual. Alternatively, you might consider a segmented bifocal fit low, or single vision distance glasses. Excellent distance vision and much less expensive than PALs. Suggestion- have the doctor or optician show you the vision with a reduced add power of about +2.25/+2.50. I think you'll find that adequate for what is essentially a pair of driving glasses, and because you have separate readers and computer glasses. Use my recommendations as a starting point only. Trust your optician to steer you in the right direction using their experience and by having much more information about your history and visual requirements. >Thanks for your help. > >Louise Your welcome, Robert Martellaro ~~~~~~~~~~~~~~~~~~ Optician/Owner Roberts Optical Wauwatosa Wi. ~~~~~~~~~~~~~~~~~~ "An expert is a person who has made all the mistakes that can be made in a very narrow field." - Niels Bohr >>Louise > [quoted text clipped - 8 lines] > Hope this helps, > Robert Martellaro I have heard that Hoya ID has a wider intermediate area (at the expense of reading and distance area) as compared to the Rodenstock ILT. Is that correct? Are these two about the same price? >I have heard that Hoya ID has a wider intermediate area (at the expense of >reading and distance area) as compared to the Rodenstock ILT. Is that >correct? Mark, I haven't worn either lens but the ID should have a narrower intermediate on both meridians because of its short corridor design, similar to the XS ILT. >Are these two about the same price? I'm guessing that the Hoya lens would be about $100 more than the Multigressiv ILT, if the ILT is priced similarly to the Multigressiv 2, which I haven't been able to get since June '06. "Rodenstock, the German manufacturer of ophthalmic lenses, has been acquired by European private equity firm Bridgepoint from the current owner Permira, another private equity." The USA operation is owned by Optical Distributor Corp. I'm still trying to product availability. Regards, Robert Martellaro ~~~~~~~~~~~~~~~~~~ Optician/Owner Roberts Optical Wauwatosa Wi. ~~~~~~~~~~~~~~~~~~ "An expert is a person who has made all the mistakes that can be made in a very narrow field." - Niels Bohr |
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