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  1. Center thickness fomulae with base curve into account OR chart

    Before I decided to post this, I searched through the web and this site but didn't find exactly what I am looking for. I would like to know if somebody can help me with the center thickness formula...
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    yes, I have seen it, okey so thats one down from...

    yes, I have seen it, okey so thats one down from 5000 visitors that optiboard claims they had at one time logged in. What about the rest??? Anybody.
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    140 views and no email??. Wow. So a 17 year...

    140 views and no email??. Wow. So a 17 year old is making 100 grands a year developing video games, which doesn't earn you any degree. Also somebody just came up with $500 substitute for...
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    optical problem solving website

    Hi I am optician, and I have developed a website for ECPs to solve for optical problems online. The site is perfect for students and faculties of college or universities to simulate a situation and...
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    Thanks to all. Uncut I am acutally an optician....

    Thanks to all. Uncut I am acutally an optician. LOL. You can assume I am a student since I am still learning. Actually I am developing a website for students. I want students to look at Rx, and...
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    Rx Classification

    consider the following and determine the type of refractive error(s). Classify the astigmatism further if any:

    OD: +2.00 -3.00 180 Add: +1.25

    If I were to classify the above rx in simple...
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    thanks tmorse, helped me visualize.

    thanks tmorse, helped me visualize.
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    thanks vcom, thats what I thought but i didn't...

    thanks vcom, thats what I thought but i didn't want to say it myself first. How about aniseikonia. I guess proabably same
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    type of refractive errors

    Hi all, I need to know what what is the minimum power diff when rx can be considered anisometropic. for example, -1.00 and -1.25 DS OD and OS respectively I don't think it will be. -1.00 and -4.00...
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