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As an optometrist and a deutan, I always found it rather difficult to explain and describe to patients what a color deficiency was like. Your explanations and demonstrations are outstanding- definitely a link I will add to my brown (or is it green?) web page! Z(I thought my dry cleaner was doing a lousy job of getting rid of spots, but I could never prove it!!)
-D.H.B., OD
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  • Vischeck accepts most common image formats. However, we recommend that you use PNG or JPEG format for uploading large images as these tend to transfer faster.
  • For PowerPoint slides, you can save all your slides as PNG images with "Save As..." and run Vischeck on each slide.
  • If you have many images to process, consider downloading Vischeck to run on your own computer.)
  • Uploading a large file may take a while - please be patient!

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