In an alignment lid attachment GP fit, the fluorescein pattern should show what characteristic?

In an alignment lid attachment GP fit, the ideal fluorescein pattern should demonstrate a thin, even layer of fluorescein. This indicates that the lens is adequately aligned with the contours of the cornea and is properly centering on the eye. A thin, even fluorescein layer signifies that there is appropriate apical clearance, allowing for a stable tear film beneath the lens and ensuring comfort for the wearer.

The presence of a thin layer suggests that the lens is not too tight, which could restrict tear exchange, or too loose, which could lead to instability and displacement. Overall, this pattern maximizes the health of both the lens and the cornea by promoting efficient tear exchange while providing necessary cushioning between the lens and the eye's surface.

Other patterns, such as a thick layer, moderate pooling, or uneven distribution of fluorescein, would indicate potential issues with lens fit. For example, a thick layer could suggest excessive clearance leading to movement and reduced stability, while pooling or uneven distributions might result from a poorly fitting lens that could cause discomfort or corneal complications. A thin, even layer is therefore the hallmark of a well-fitted alignment lid attachment GP lens.