What is typically a sign of a poorly finished transitional zone in contact lenses?

A poorly finished transitional zone in contact lenses often presents as poor blending of curves. The transitional zone is the area that connects the central optical zone of the lens with the peripheral zone. A smooth and well-manufactured surface is crucial for proper lens comfort and visual performance. When there is poor blending in this area, it can lead to discomfort for the wearer, as abrupt changes in curvature can irritate the eyelid during blinking. This seamless transition is essential for maintaining a natural feel and ensuring that the lens interacts well with the eye's surface.

While other indicators such as visible scratches, sharp edges, and fogging can imply issues with the lens quality or maintenance, they are not specifically tied to the transitional zone's finishing quality. Visible scratches might indicate external damage, sharp edges could result from manufacturing defects, and fogging usually relates to moisture or protein build-up rather than the curve blending of the lens itself. Thus, recognizing poor blending of curves is key in identifying problems related to the transitional zone's finish in contact lenses.