Despite its effectiveness in autoimmune diseases, hydroxychloroquine is not without its risks. plaquenil buy Long-term use of the medication can lead to ocular toxicity, specifically retinopathy, which may result in irreversible vision loss if not detected and managed early. Regular monitoring of visual function and retinal health is essential for patients on prolonged hydroxychloroquine therapy. Ophthalmologists play a crucial role in screening for and managing this potential side effect.