Over-the-counter eye drops, such as those marketed for redness relief, often contain tetrahydrozoline, a decongestant. This ingredient constricts blood vessels in the eye, temporarily reducing redness. However, prolonged or frequent usage can lead to a rebound effect, where the blood vessels become more dilated than before, resulting in increased redness.
The temporary relief provided by these eye drops can mask underlying conditions causing the redness, such as allergies, infections, or dry eye syndrome. This can delay proper diagnosis and treatment of the root cause. Furthermore, extended use can reduce the eye’s natural ability to lubricate itself, exacerbating dryness and discomfort over time.
