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Use "astigmatic" in a sentence
"This discrepancy in focal length is a measure of the astigmatism, often referred to as the astigmatic difference, and will depend on the inclination angle of the light rays and the lens power (as opposed to the shape or refractive index)."
"A red-headed researcher, actually working on a problem of a transistor which would record the TP impulse, hastily invented the fact that TP optical transmission was astigmatic and humbly requested enlightenment."
"The astigmatic test at a local Wal-Mart Vision Center"