Costco Optical Department Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Toric correction is specifically designed for astigmatism, which is a common refractive error caused by an irregular curvature of the cornea or lens. This irregular shape prevents light from focusing evenly on the retina, leading to blurred or distorted vision.

Toric lenses have different curvatures in different meridians, allowing them to correct for the two different focal points that typically occur with astigmatism. This design ensures that the lens aligns properly with the eye’s unique shape, providing clear vision at various angles.

The other types of corrections are not tailored for astigmatism. Spherical correction addresses myopia or hyperopia by focusing light onto a single point, while monovision correction is used primarily to treat presbyopia, allowing one eye to focus for distance and the other for near vision. Multifocal correction encompasses a variety of prescriptions to help with vision at multiple distances, but it does not specifically target the irregular curvature associated with astigmatism.