Your doctor will usually prescribe one of two kinds of eye drops: antibacterial or anti-inflammatory drops. Antibacterial drops protect from infection, while anti-inflammatory drops prevent swelling. If you have trouble treating your own eyes, ask a friend or family member to help. Your doctor may also prescribe drops that keep the eye dilated, like atropine, to help prevent scarring of the pupil and pain. He may also prescribe drops to help lower the eye pressure, especially if there is gas or oil injected into the eye during surgery. Tilt your head backward and focus both eyes upward to avoid blinking. Pull your lower lid down with one finger to create a pocket under the eye, and administer the drop. Close your eyes, but don't rub them. Wait at least five minutes between administrations of each drop. Avoid touching your eye with eyedropper tip. Applying eye ointment is a lot like using eye drops. Tip your head back and gently pull down on your lower lid to form a pocket. Turn the bottle upside down over your eye and gently squeeze it to pour a thin stream of ointment into the pocket. Close the eye for about a minute to let the ointment spread over the eye and start working. Your doctor will likely tell you to clean around your eye twice a day. For example, you may boil water and place a clean washcloth into the water to sterilize it. Wash your hands to make sure they're clean, then run the washcloth gently over your upper and lower eyelids and lashes. Make sure that you also run the cloth over the corners of your eyes. Wash the cloth in boiling water or choose a fresh, clean cloth before each use. The cloth must be sterile, as eyes are vulnerable to infection after surgery.

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Write a summary of the previous text in Vietnamese:
Dùng thuốc nhỏ mắt theo hướng dẫn. Tra thuốc nhỏ mắt. Biết cách tra thuốc mỡ mắt. Rửa mắt theo hướng dẫn của bác sĩ.