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).
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?