Hysol Eye Drop is a sterile ophthalmic solution formulated with Phenyl Mercuric Nitrate (0.001% w/v) as a preservative and Sodium Chloride (5% w/v) to maintain isotonicity. This preparation is intended for use as an ocular antiseptic and cleansing agent to prevent and control bacterial contamination in the eye. Phenyl Mercuric Nitrate exhibits broad-spectrum antimicrobial activity, effectively inhibiting the growth of various bacteria and fungi, thereby reducing the risk of ocular infections. The inclusion of Sodium Chloride ensures the solution is isotonic with natural tears, minimizing irritation and promoting patient comfort upon instillation. Hysol Eye Drop is suitable for use in conditions requiring maintenance of sterility in ophthalmic procedures, as well as for general eye hygiene. It should be administered according to prescribed dosage and frequency to avoid potential toxicity associated with mercury-containing compounds. Caution is advised in patients with known hypersensitivity to mercurial compounds. The product is intended for topical ophthalmic use only and should not be ingested. Proper storage conditions must be maintained to preserve efficacy and sterility. Hysol Eye Drop provides an effective option for ocular antisepsis in clinical and home settings.