What is the most common indication for using toric lenses?

Toric lenses are specifically designed to correct astigmatism, which is caused by an irregular curvature of the cornea or lens that leads to blurred or distorted vision. These lenses have different optical powers in different meridians, allowing them to compensate for the unique shape of the eye associated with astigmatism.

While the other choices are common refractive errors—hyperopia (farsightedness), presbyopia (age-related loss of near focus), and myopia (nearsightedness)—they do not specifically necessitate the unique design and functionality of toric lenses. Instead, standard spherical or bifocal lenses are typically employed to correct these conditions. Since astigmatism is the primary indication for the use of toric lenses, this makes the correct choice the most relevant in this context.