What effect can poor insertion techniques have on the cornea?

Poor insertion techniques can lead to arcuate staining patterns on the cornea, which are indicative of localized areas of damage or irritation. When contact lenses are not inserted correctly, they can shift or rub against the corneal surface inappropriately. This friction can disrupt the epithelial layer of the cornea, leading to staining that is visible during a fluorescein dye examination.

Arcuate staining patterns are typically seen at the periphery of the cornea and can suggest that the lens is causing mechanical stress. In contrast, other options do not directly relate to the effects of poor insertion technique. Increased tear production, for example, might occur for other reasons but is not a direct consequence of improper lens insertion. Corneal neovascularization refers to the growth of new blood vessels into the cornea, often due to oxygen deprivation or chronic irritation, but this is more associated with prolonged lens wear or hypoxia rather than poor insertion techniques. Furthermore, choosing "none of the above" would dismiss the direct correlation between poor technique and the resultant corneal staining.