What are common reasons for lens distortion?

Lens distortion can arise from various factors, but a significant reason stems from poor fitting, an incorrect prescription, or defects in lens manufacturing.

When lenses are not properly fitted to the frame or the individual's face, they may not sit at the correct angle or distance from the eyes, leading to visual distortions. An incorrect prescription means that the lenses have not been tailored to the individual's specific vision needs, resulting in improper magnification or focus, which can cause blurriness or distortion. Additionally, lens manufacturing defects, which can include flaws in the material or inaccuracies in the production process, can directly affect the optical quality and cause unwanted distortions.

While high temperature exposure during manufacturing could potentially lead to issues, it is less common compared to the direct impact of fitting and prescription accuracy. Similarly, using outdated lens technologies may influence quality, but does not specifically lead to distortion in the same manner that improper fitting and prescription errors do. Therefore, the options related to fitting and prescription quality are central to understanding common reasons for lens distortion.