What is a common abnormal response reported by contact lens wearers?

Among the options provided, a common abnormal response reported by contact lens wearers is characterized by a burning sensation that frequently occurs during the afternoon. This type of discomfort can be attributed to several factors related to contact lens wear, such as dryness from prolonged use, insufficient tears, or environmental irritants.

In many cases, lens wearers experience increased symptoms later in the day when lens-related issues may become more pronounced due to factors like the natural decrease in tear production and lens dehydration. The discomfort may also stem from the cumulative effect of wearing lenses throughout the day, leading to increased sensitivity and irritation.

Other responses discussed can occur in contact lens wearers but are less commonly flagged as abnormal. For instance, redness that improves overnight may indicate a non-serious issue that can resolve with rest. Increased sensitivity to light may occur for various reasons, not strictly associated with contact lenses, and constant discomfort regardless of wear time suggests a more persistent issue rather than a common transient response to lens wear.