If your cat has runny eyes or a discharge, use dampened cotton wool to wipe away the gunk. Do this as often as is needed, which for some cats with a heavy infection could mean hourly.  Pat the eye dry afterwards. As the cotton wool become soiled, switch to a fresh piece. Use separate pieces for each eye. It is not uncommon for kittens with an eye infection to have their eyelids stuck shut by discharge. It is important to clean their eyes because the infection could build up behind the eyelids and then cause blindness. If the eyelids are gummed shut, soak a clean ball of cotton wool in some previously boiled (and cooled) water. Repeatedly wipe the damp cotton ball over the eye, wiping from the inside corner to the outside. At the same time use the finger and thumb of the opposite hand to apply gentle pressure to the upper and lower lids in order to pry them open. Trim long hair away from the eyes and keep its face clean. It is also a good idea to avoid using aerosols near a cat, as its eyes are very sensitive and may weep as a result.

How would you rephrase that briefly using Vietnamese?
Lau sạch dịch tiết ở mắt. Thật cẩn thận khi chăm sóc mắt cho mèo con. Tránh để mắt mèo bị kích ứng.