 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  vessels in the eye.Some brands of tetrahydrozoline eye drops may contain lubricants. Lubricants help protect the eyes from more irritation and dryness. How to use Eye Drops Follow all directions on the product package, or use as directed by your doctor. If you have any questions, ask your doctor or pharmacist. To apply eye drops, wash your hands first. To avoid contamination, do not touch the dropper tip or let it touch your eye or any other surface. Remove contact lenses before applying the eye drops. Wait at least 10 minutes after using this medication before inserting contact lenses. Before using, check this product visually. Do not use if the liquid has changed color or is cloudy. Discard the medication away from children and pets. Use this medication in the affected eye(s) up to 4 times a day as needed or as directed by your doctor. Tilt your head back, look upward, and pull down the lower eyelid to make a pouch. Hold the dropper directly over the eye and place 1 drop into the pouch. Look downward and gently close your eyes for 1 to 2 minutes. Place one finger at the corner of the eye near the nose and apply gentle pressure. This will prevent the medication from draining away from </s>