NCLE Basic Certification Practice Exam

Fluorescein is a dye frequently used in ocular diagnostics, particularly to assess the integrity of the cornea and to fit contact lenses. However, it is not recommended for use with soft contact lenses primarily because it can indeed dye the lens. Soft contact lenses are often made from hydrogel or silicone hydrogel materials that can absorb substances from their environment, including fluorescein. When fluorescein is used with these lenses, it may lead to discoloration that can be permanent, affecting the biocompatibility and aesthetics of the lenses.

Additionally, while fluorescein may produce some staining effects on the cornea, the implications for lens material are more critical in this scenario. The interaction with soft lenses could also potentially alter their properties, leading to questions regarding both safety and comfort for the wearer. Thus, avoiding fluorescein is essential for maintaining the clarity and integrity of soft contact lenses.