Always wash your hands before and after using chloramphenicol ointment to prevent passing the infection to your other eye. Remove the cap and place the nozzle close to your eye without touching the eyeball, then, gently pull the lower eyelid downwards and look up. Squeeze the tube gently and apply about 1cm of the ointment to the space between the lower eyelid and the eye. Keep your eye closed for a moment, then replace the cap securely.