What is the purpose of a hyper flange in contact lens design?

A hyper flange is specifically designed to increase lens stability in contact lens design. When a lens has a hyper flange, it creates a more secure fit on the eye, which helps to prevent unwanted movement during blinking or when the eye is in motion. This stability is crucial for maintaining comfort and visual clarity, as excessive lens movement can cause irritation or an unstable visual experience.

In the context of contact lens design, other options focus on features that serve different functions, but they do not align with the primary purpose of the hyper flange. Improving oxygen permeability is more related to the material of the lens rather than its structural features. Removability pertains to other design aspects that facilitate taking the lens off; while enhancing visual acuity is typically addressed through the lens shape, prescription, and overall fitting rather than through structural additions like a hyper flange.