Over-the-counter eye drops, similar to these marketed for redness reduction, usually include tetrahydrozoline, a decongestant. This ingredient constricts blood vessels within the eye, briefly lowering redness. Nonetheless, extended or frequent utilization can result in a rebound impact, the place the blood vessels turn out to be extra dilated than earlier than, leading to elevated redness.
The momentary reduction supplied by these eye drops can masks underlying situations inflicting the redness, similar to allergic reactions, infections, or dry eye syndrome. This could delay correct analysis and therapy of the foundation trigger. Moreover, prolonged use can scale back the attention’s pure capability to lubricate itself, exacerbating dryness and discomfort over time.
