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Medical Forum / General / Vision / December 2004A Progressive Lens ?
Good Day All, Which progressive lens would provide me the best vision? I am looking at Zeiss and Rodenstock lens and frames but I am open to other suggestions. I would like a wide field of view (peripheral vision) if possible. My prescription is: O.D. +0.50 -0.75 X 090 O.S. +0.50 -1.00 X 094 Add +1.50 I work at a computer. I also do hands on repairs of controllers and sensors, sometimes in dimly lit areas. I also bicycle long distances and need help seeing in the distance or doing quick repairs. Lately I have had to pick up reading glasses and I have also noticed that my intermediate and distant viewing are also blurring. Other than that, I have not worn glasses the last three or four years. Kind Regards and Thanks in Advance, Father Times PS: I once bought a pair of glasses that just corrected my stigmatism and allowed me to read distant street signs. Good Day, Would the optics be better for my prescription in a mid-index such as Rodenstocks or Solamax? Any brand preferences or advantges in mid index lens? O.D. +0.50 -0.75 X 090 O.S. +0.50 -1.00 X 094 Add +1.50 Kind Regards Father Times > Good Day All, > [quoted text clipped - 28 lines] > PS: I once bought a pair of glasses that just corrected my stigmatism and > allowed me to read distant street signs. > Good Day, > [quoted text clipped - 6 lines] > O.S. +0.50 -1.00 X 094 > Add +1.50 Your prescription is minimal and there is little advantage to a mid index lens. If you work on a computer and have little need for good distance vision while on the computer, you will have the largest field of view with the least distortion with single vision reading glasses instead of progressives. Even if you need some distance viewing, if you had them made as half eyes you could peek over them for distance (your distance prescription is minimal and naked eye viewing should be adequate) and push them further up your nose while on the computer. For biking, get distance glasses that double as sunglasses either with a clip on or with self darkening lenses. Carry your half eye readers for repairs. If you do very tiny near work at close range, you may need a pair of drugstore +2.50 for that. Dr Judy > Kind Regards > [quoted text clipped - 32 lines] >> PS: I once bought a pair of glasses that just corrected my stigmatism and >> allowed me to read distant street signs. > > Good Day, > > [quoted text clipped - 6 lines] > > O.S. +0.50 -1.00 X 094 > > Add +1.50 "Mid-Index" is too vague. Some people may consider a mid-index to be either 1.54 or 1.60 due to the fact that the use of 1.66 and higher lens index powers have increased dramatically in the last 5 years. Sola Spectralite material (1.54 index) would be a good choice. It has excellent optics (abbe value is 47) and is fairly light. Whether the Solamax design is the best choice is debatable, but many people like it. The high-end Rodenstocks seem to be preferred by many, although they are not cheap. I have heard that Sam's optical was running a special on Rodenstock progressives, although it may be expired. Just remember that each manufacturer (Sola, Rodenstock, etc) usually has several different Progressive lens designs (in addition to several different materials) in their line. In your case you referenced a particular lens design from Sola (Solamax design) and a brand (Rodenstock) that has several different progressive lens designs. Sola also has the Percepta progressive lens designs in addition to the venerable VIP progressives. > Good Day, > [quoted text clipped - 10 lines] > > Father Times Rodenstock is a lens manufacturer who makes several models of PAL's including the Progressiv AT, Progressiv XS, Progressiv Life 2, and Multigressiv 2. They each have different PAL designs. The ones with Automated Prescription Technology (each lens custom made for your Rx without using base curve blanks) are usually considered the best. Sola is a manufacturer who makes several models of PAL's including the Solamax, Percepta, VIP and others. Each of the manufacturers usually offer several different lens MATERIALS for each of the PAL designs, such as CR-39, Spectralite, polycarb, 1.60, etc). Some of these materials (like Spectralite) are proprietary to the manufacturer. So your statement about which is better (Rodenstocks or Solamax) is comparing apples to oranges. However, the high end Rodenstocks with Automated Prescription Technology are usually considered to be the most advanced designs, which is not surprising when you see the prices. Many people with your Rx are quite happy with Solamax, especially if you don't do a lot of mid-distance work (like on a computer). Most people would consider the high end Rodenstocks as someehat of an overkill for your mild Rx. But if you can afford the high-end Rodenstocks, then they will likely be somewhat better and more sophisticated designs than the Solamax, but the Solamax has a better mid-index material (Spectralite). Good Day All, It is a polycarbonate world when you go to Sam's, Wal-Mart, Sears and Costco (I'll try BJ's later). They all describe polycarbonate as superior in all aspects. Likewise, they do not know what they are really offering in Zeiss and Rodenstock. So if I'm going to obtain better optical-quality eyeglasses it will be through this group's guidance. Wal-Mart's polycarbonate ultras have Zeiss scratch resistant treatment and Crizal Alize AR for $217 with supposedly a wider mid-distance channel. Of course they do not provide their abbe value. >Solamax, especially if you don't do a lot of mid-distance work (like on a >computer). Unfortunately, I do a lot of computer work. I was leaning towards Solamax Spectralite but with its narrow mid-distance channel it does not seem a good choice for me. If I go to an independent optician, I would at least like to know before-hand what the best lenses / material are for my prescription and needs. O.D. +0.50 -0.75 X 090 O.S. +0.50 -1.00 X 094 Add +1.50 Thanks to Everyone in Advance (and for your previous replys), Father Times >> Good Day, >> [quoted text clipped - 41 lines] > the Solamax, but the Solamax has a better mid-index material > (Spectralite). > Good Day All, > [quoted text clipped - 3 lines] > and Rodenstock. So if I'm going to obtain better optical-quality eyeglasses > it will be through this group's guidance. Forget about what they tell you. Just get something besides polycarbonate. I assume you can still buy at a shop even if you don't agree with them about the choice of lens material (assuming they offer other materials). For your Rx, you don't need a high index material. You could probably do fine with CR-39 (regular plastic) since your Rx is mild and thickness/weight is not going to be a problem. YOU MUST ASK TO SPEAK TO THE HEAD OPTICIAN. If you don't like what they say, go to another Wal-Mart. > Wal-Mart's polycarbonate ultras have Zeiss scratch resistant treatment and > Crizal Alize AR for $217 with supposedly a wider mid-distance channel. Of > course they do not provide their abbe value. Abbe value of all polycarbonate is 30. Doesn't matter who makes it. Zeiss lenses are good in general, but if you can avoid the polycarb you will better off for your Rx. I am surprised that you cannot get other lens materials besides polycarb. > >Solamax, especially if you don't do a lot of mid-distance work (like on a > >computer). > > Unfortunately, I do a lot of computer work. I was leaning towards Solamax > Spectralite but with its narrow mid-distance channel it does not seem a good > choice for me. Keep in mind that most PAL's have narrow mid-distance vision and are not ideal for computer work unless they are custom made for mid distance in the upper part of the lens (which means you cannot use them for driving). There are specialized "computer" PALs such as Zeiss RD. Or maybe get a pair of bifocals just for computer work (with far distance set to about 24"). Talk to your OD about this. > If I go to an independent optician, I would at least like to know > before-hand what the best lenses / material are for my prescription and [quoted text clipped - 6 lines] > Thanks to Everyone in Advance (and for your previous replys), > Father Times It depends on how much you want to spend. The high end lenses from manufacturers such as Rodenstock, Zeiss, Varilux, Sola, Hoya, are all good. But you don't necessarily need the very best lens design for your mild Rx and you only need a mid-index or even CR-39 lens material. These issues have been discussed many times in previous posts. You can view the newsgroup archives at http://groups.google.com/groups?hl=en&lr=lang_en&newwindow=1&group=sci.med.vision >> Good Day All, >> [quoted text clipped - 16 lines] > CR-39 (regular plastic) since your Rx is mild and thickness/weight is not > going to be a problem. Poly is a decent material for lenses. All season tires are decent tires for your car. Both do nothing really spectacular, they just do it all fairly well. Poly is loved in the corporate world because it reduces lawsuit liability and it is a thinnner mid index material and the lightest per cubic mm save for Trivex. The Zeiss and Rodenstock offerings at mega corporate stores will be their lower level offerings due to the wholesale costs and manufacturing restrictions. > YOU MUST ASK TO SPEAK TO THE HEAD OPTICIAN. If you don't like what they > say, > go to another Wal-Mart. Hopefully, you're in a licensed optician state, not a certified state, or even worse, a non regulated state where the head optician may have been a swing manager at McDonalds a week before. >> Wal-Mart's polycarbonate ultras have Zeiss scratch resistant treatment >> and >> Crizal Alize AR for $217 with supposedly a wider mid-distance channel. >> Of >> course they do not provide their abbe value. The Zeiss Life and Life XS will have the manufacturer's scratch coating on the front side, but the backside will have a coating applied at Wal-Mart's main lab. I highly doubt Wal-Mart farms the surfacing out to Zeiss. I also find the offering of a poly progressive with Crizal Alize AR at the 217$ price point questionable (This is another proprietary product that is applied at Essilor labs on Essilor materials exclusively.) . That would be in the Essilor Reflection Free price range and the RF AR can be applied by Wal-Mart's own labs. It might also be a Kimodo AR or one of several other brands. Progressives by nature are narrow in the intermediate. Unless you get a specialty computer progressive, the end results will be essentially the same with most modern progressives. The variation is only about a mm. The feeling one perceives when one exits the clear zone in the intermediate does vary somewhat from brand to brand. It's a hit or miss with this one. Everyone likes something different and you'd have to find one of the diminishing number of professional opticians to help guide you. They'll give the one on one chat that has more to do with how you look at things rather than how many pairs of glasses you need. > Abbe value of all polycarbonate is 30. Doesn't matter who makes it. Zeiss > lenses are good in general, but if you can avoid the polycarb you will > better off for your Rx. I am surprised that you cannot get other lens > materials besides polycarb. Some people can press poly better than others resulting in less birefringence. Abbe value is relative to a few individuals only. People have done fine for generations with barium glass segments for reading fused into crown glass distance lenses. Too many people use Abbe values to support prejudices (it has little to do with most rejections of the material, it's just a number that opticians grab to justify a bad match between material and patient,) it prevents having to actually consider all materials at hand and what would fit the needs/cost benefit to the patient at hand. Sometimes poly is best, sometimes it is the worst. >> >Solamax, especially if you don't do a lot of mid-distance work (like on >> >a [quoted text clipped - 14 lines] > bifocals just for computer work (with far distance set to about 24"). Talk > to your OD about this. You could always go with the AO Technica if you REALLY need to have some distance vision (20 ft +) in the computer glasses. It's basically a soft progressive turned upside down, so the distance is the the tiny area rather than the near or intermediate. The fade from the sharp to the blurry is very gradual, so you don't really notice the blur until you get a few mm out of the channel. DON'T DRIVE WEARING THEM!! >> If I go to an independent optician, I would at least like to know >> before-hand what the best lenses / material are for my prescription and [quoted text clipped - 12 lines] > But you don't necessarily need the very best lens design for your mild Rx > and you only need a mid-index or even CR-39 lens material. Most modern designs are so close in performance that it basically comes down to an availability/ price decision. You can go all out for the Atoric both sides custom ground for the frame and Rx (VERY expensive and very good at everything,) or you can get pretty good performance from alot of modern designs from almost a dozen vendors. I wouldn't go with anything older than the Essilor Natural or Varilux Comfort which are both older designs from the early nineties. The newer ones offer so much more! Anything older is just a waste of money unless you're so used to them and unwilling to change that nothing else will do. Yes, the VIP still lives!! :( > These issues have been discussed many times in previous posts. You can > view > the newsgroup archives at > http://groups.google.com/groups?hl=en&lr=lang_en&newwindow=1&group=sci.med.vision CARL |
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