👉 Astigmatic refers to the phenomenon of a person's vision changing size and shape, often due to an imbalance in their eye muscles. This can occur when one eye is longer than the other, causing light rays to bend or scatter differently, leading to different visual acuity and difficulty with certain tasks like reading or driving. Astigmatism can be corrected through corrective lenses like glasses or contact lenses that are designed to correct the deviation from normal.