Vision defect correction: short- and long-sightedness.
Vision-defect correction: short- and long-sightedness.
Vision-defect correction: short- and long-sightedness.
Vision-defect correction: short- and long-sightedness.
Vision defect correction: short- and long-sightedness.
Vision-defect correction: short- and long-sightedness, and astigmatism.