What is retroscopic tilt and the need for it in eyeglasses?

Retroscopic tilt refers to the backward angle of the lens in eyeglasses, which helps align the optical center of the lenses with the wearer's line of sight. This adjustment is crucial for optimizing visual clarity and comfort, particularly for individuals with specific prescription needs or those who have a tendency to tilt their heads while reading or looking at screens. By incorporating retroscopic tilt, eyeglasses can enhance both the effectiveness of the prescription and the overall ergonomics of the eyewear.