On Tuesday, November 23, 2010 at 7:11:40 PM UTC-5, Optical wrote:   
   > I was having this argument at work.   
   >    
   > Some claim that reading glasses work because they magnify small print.    
   > They claim that reading glasses sold at drug stores are labelled in   
   > terms of their "magnification power" or strength.   
   >    
   > I was arguing that the goal of reading glasses is not to magnify, but to   
   > move the focal point, and that they don't really perform any   
   > magnification.   
   >    
   > Who's right?   
   >    
   > Do many people use the term "magnification" incorrectly when talking   
   > about reading glasses?   
      
   Kendra joined the chat   
   Kendra   
   How may I assist you?   
   john wright   
   I wear reading glasses with 2.25 diopter with a focal lenth of 12".  They work   
   fine for household chores, cooking, reading.  When I play my violin, the music   
   is 28" away and usually the notes and staff and words are out of focus and too   
   small.  I bought    
   several of you magnifiers from Amazon to try them out, but they only made the   
   music at 28" more out of focus, so I sent them back.  As a violin player the   
   focal length has to be 28" to get the violin and bow between me and my music   
   stand.  which product    
   do you have for the violin players delema.   
   Kendra   
   Hazuki Magnifying Glasses come in two different focal lengths. The first   
   starting at 1.6 (For close-range activity; 30-40 CM)Hazukis.The high   
   magnification is suited for close-range, detailed tasks, such as reading, nail   
   art, or crafting, making that    
   fuzzy menu easy to read and that hard-to-see needle easy to thread. The second   
   is our 1.32 (Long Focal Distance; 50-70 CM) Hazukis. The long focal distance   
   allows for a natural posture enabling PCs, smartphones, tablets, or video   
   games to be used    
   comfortably.   
   Is there anything else I can assist you with?   
   john wright   
   So this does not answer my question,...I need a magnifier that makes an object   
   at 28" focal length from my eyed magnify one and one half times bigger and be   
   in focus   
   Kendra   
   I would recommend the 1.32 magnification   
   john wright   
   So the music needs to be magnified 1 and 1/5 to 2 times bigger, and be in   
   focus at 28".   Regular reading glasses are for focus correction and not for   
   magnification,  I need both magnification and focus correction.   
   So your recommendation is to get magnification one and one third times bigger,   
   but what does it do for focus at 28" from my eyes,  remember I have to get a   
   violin and a bow in there in order to be able to play the violin   
   Kendra   
   The 1.32 magnification is for long focal distance and magnifies things up to   
   160%   
   john wright   
   And how should I use these glasses, put them on over my reading glasses or use   
   them by themselves.   
   How does that math work  1.32 is 160%,  I don't get it   
   I would think that 1.32 is 1 times plus .32 times bigger or 32% bigger than 1   
   times biger   
   Kendra   
   Hazuki glasses are magnifiers not reading glasses so they do not equate to the   
   same   
   john wright   
   To find the magnification level of a lens, simply divide its diopter by 4, and   
   add 1. ... A 5-diopter lens = 5/4 + 1... or 1.25 + 1 = 2.25x. so you can see   
   that diopter and magnification is directly linked by the formula above   
   Kendra left the chat   
   john wright   
   So my reading glasses at 2.25 diopter divided by 4 = a magnification of 0.56   
   +1 or a magnification of 1.56.  So to even focus on a reading at 12 inches I   
   would need one of your glasses at 1.56 or pretty close to 1.6 magnification.    
   But when I tried one    
   of your magnifiers for music it was more out of focus that with 2.25 glasses.    
   I don't know what to do here   
   Kendra joined the chat   
   Comment submitted   
   Kendra   
   I am not sure how the magnification translates over   
   john wright   
   could you help me get an answer to my question.  I don't know how   
   magnification and focal correction work together, but I do know that if you   
   put a 1.5 dioper lense over a 2.5 diopter lense you get a3.0 diopter effective   
   lense.  I have done that with    
   lenses and paste on lenses to set up my own glasses for close up in the   
   bifocal and focus at normal reading distance.   
   Kendra   
   Reading glasses help you to focus on letters. However, letters may still   
   appear too small to read. Hazuki enlarges objects with no distortion.   
   Therefore you can have wider and clearer view with less fatigue after long   
   hours use. You can also use them    
   with your reading glasses!   
   john wright   
   So I asked google what does a 2.25 diopter mean in magnification and she said,   
   "This refers to the amount of curvature a lens will have. More curvature means   
   a thicker lens, more magnification and a higher diopter number. To find the   
   magnification level    
   of a lens, simply divide its diopter by 4, and add 1. ... A 5-diopter lens =   
   5/4 + 1... or 1.25 + 1 = 2.25x."   
   So you suggest that I could use my 2.25 lenses to focus at 12" on the music   
   and use your magnifiers to make the music larger so that I could recognize the   
   words and notes.  So I spend $40 each for two sets of magnifiers a 1.32 and a   
   1.6, and another kit    
   with 5 different sets of interchangeable lenses in it.  When I put these 1.3   
   and 1.6 mags over my glasses the music was so fuzzy I couldn't read the   
   music.  so I returned them.  When I put the magnifiers on without my glasses,   
   I could see bigger images    
   at about 6" away from my face.  so still no music reading solution.  I kept a   
   pair of the power mags for soldering small electonic components together, but   
   I still need a magnifier, focussing setup for reading music with my violin in   
   place.  That is what    
   I need your help with.   
   Kendra   
   We only have the 2 magnifications; close range 1.6 and long distance 1.32   
   john wright   
   I don't have an answer, but you were certainly patient.  Thank you.  Seems   
   like a simple situation, but has certainly been hard to get an effective   
   answer.   
   Kendra   
   I don't have much information as it relates to how the magnification   
   translates beyond what we have available; as it compares to readers they are   
   best used with your prescription or readers and can be worn alone however how   
   it correlates to the    
   information you have shared I cannot say with certainty how it goes hand and   
   hand   
   john wright   
   You are very adroit and treated me well   
   Kendra   
   Can I assist you with anything else?   
   john wright   
      
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