Your glasses prescription will list sphere (SPH), cylinder (CYL) and axis values for each eye. SPH corrects nearsightedness or farsightedness, CYL and axis correct astigmatism. A “+” means farsighted, a “–” means nearsighted.
Your glasses prescription will list sphere (SPH), cylinder (CYL) and axis values for each eye. SPH corrects nearsightedness or farsightedness, CYL and axis correct astigmatism. A “+” means farsighted, a “–” means nearsighted.