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   sci.optics      Discussion relating to the science of op      12,750 messages   

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   Message 10,903 of 12,750   
   Kevin to AES   
   Re: Progressive Lenses   
   24 Jun 11 07:16:45   
   
   eddcdaf3   
   From: kev.erwin@gmail.com   
      
   The smaller the added power, the wider the intermediate range   
   "corridor" and the fewer the side distortions. Try +2.0 diopters,   
   although personally I prefer +2.5 diopters for reading.   
      
      
      
   On 2011-06-22 11:59:25 -0700, AES said:   
      
   > In article <2vb4079hj71llcl9div7ep2g6ppqinn5to@4ax.com>,   
   >  Eric  wrote:   
   >   
   >> The original thing that I had wanted to do was to simply get a narrow   
   >> top section for distance, with the rest of the lens focused at   
   >> book/monitor length. I currently have a pair of single focal length   
   >> (non-progressive) lenses that are cut that way.   
   >   
   > My optometrist's recommendation for a two-pair solution, made earlier   
   > this morning, was one "distance" pair with a smallish bifocal inset   
   > adjusted to normal reading distance, and a second 100% "reading" pair   
   > adjusted to my most often used reading distance.   
   >   
   > Or, if I have dual-mode reading habits, viz. a shorter distance D1 for   
   > magazines, books, and my smaller-screen laptop, and a longer distance D2   
   > for the big-screen monitor on the far side of my desk, then two   
   > different "reading" pairs, separately optimized for these two situations.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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