Which statement best describes LARS?

Which statement best describes LARS?

• A. LARS moves the lens axis in the eye.
• B. LARS uses prism power to compensate.
• C. LARS is a surgical technique.
• D. LARS is a compensation technique that adjusts the spectacle axis by Left Add, Right Subtract to offset lens rotation.

Answer: (D)

LARS describes a way to keep toric corrections accurate by changing the glasses’ axis rather than the lens itself. When a toric lens or corrective device rotates, the intended cylinder orientation shifts and the wearer loses the correct correction. LARS provides a simple rule: adjust the spectacle axis by a Left Add and a Right Subtract to offset that rotation, so the overall effect remains aligned with the eye’s meridians. This approach is about spectacle prescriptions, not moving the lens axis inside the eye, not using prism power as the main tool, and not involving surgery. By applying this axis adjustment, the wearer continues to get the intended refractive correction even if the toric device has rotated.

LARS describes a way to keep toric corrections accurate by changing the glasses’ axis rather than the lens itself. When a toric lens or corrective device rotates, the intended cylinder orientation shifts and the wearer loses the correct correction. LARS provides a simple rule: adjust the spectacle axis by a Left Add and a Right Subtract to offset that rotation, so the overall effect remains aligned with the eye’s meridians. This approach is about spectacle prescriptions, not moving the lens axis inside the eye, not using prism power as the main tool, and not involving surgery. By applying this axis adjustment, the wearer continues to get the intended refractive correction even if the toric device has rotated.