What lens type is typically used to correct vision for individuals with a curvature in their cornea?

Toric lenses are specifically designed to correct astigmatism, which is a condition often caused by an irregular curvature in the cornea. These lenses have different refractive powers in different meridians, allowing them to compensate for the uneven focus that results from the corneal curvature. This tailored design ensures that light entering the eye is properly refracted, resulting in clearer vision for those affected by astigmatism.

Other lens types, while useful for various vision correction needs, do not address the unique requirements posed by an irregular cornea. Multifocal lenses are designed for presbyopia and provide multiple focal points for distance and near vision. Single vision lenses are ideal for correcting a single vision problem, such as nearsightedness or farsightedness, but do not accommodate the complexities of astigmatism. Bifocal lenses, which have two distinct optical powers, are primarily used for individuals who need help with both distance and near vision, but like single vision lenses, they do not cater specifically to the conditions caused by corneal curvature.