Spherical Equivalent Refraction (SER)
Eye care professionals use the term spherical equivalent refraction (SER) to refer to an eye's effective focusing power if only spherical aberration were present. SER can be defined as:
Read more about this topic: Eyeglass Prescription
Famous quotes containing the word equivalent:
“The reality is that zero defects in products plus zero pollution plus zero risk on the job is equivalent to maximum growth of government plus zero economic growth plus runaway inflation.”
—Dixie Lee Ray (b. 1924)