 <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]  following a certain type of corrective eye surgery (corneal refractive surgery). Ketorolac belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). It works by blocking certain natural substances in your body to reduce pain and swelling. How to use Ketorolac 0.4 % Eye Drops Apply this medication to the operated eye(s) as directed by your doctor, usually 4 times daily as needed. 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. This medication should not be used while wearing contact lenses. Consult your doctor or pharmacist for details. Tilt your head back, look upward, and pull down the lower eyelid to make a pouch. Hold the dropper directly over your eye and place one drop into the pouch. Look downward and gently close your eyes for 1 to 2 minutes. Place one finger at the corner of your eye (near the nose) and apply gentle pressure. This will prevent the medication from draining out. Try not to blink and do not rub your eye. Repeat these steps for your other eye if so directed. Do not rinse the dropper. Replace the dropper cap after </s>