• Trying to order some glasses from Glasses Direct, based on my contact lens prescription and the "sphere" parameter doesn't go high enough - if, of course, I am correct and that's the first cell in the chart below?

  • Sphere is another term for Power in your table above; not sure what the 'Parameters' bit is, but that may be contacts-specific. For a standard specs prescription you just need power (or sphere), and cylinder and axis for any astigmatism (and possibly Pupillary Distance).

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