Why is it important to assess lens edge after checking GP lens fit?

Assessing the lens edge after checking the fit of a gas permeable (GP) lens is crucial because the lens edge plays a significant role in the overall lens movement on the eye. A well-designed lens edge can contribute to the comfort and stability of the lens during wear. If the edge of the lens is too sharp or has an inappropriate design, it might not allow for adequate movement, which is essential for maintaining a proper tear exchange beneath the lens. Proper lens movement is important for both comfort and the health of the cornea, as it allows for the nourishment of the underlying tissue through tear exchange.

Movement of the lens affects how it sits on the eye, which in turn impacts the overall effectiveness of vision correction provided by the lens. Therefore, monitoring the edge is vital in ensuring that the lens performs optimally during wear.

While other factors like lens color, optic zone thickness, and vision quality are relevant in lens design and function, they do not directly relate to the critical function of the lens edge concerning movement and fitting.