You can try using tea bags on them. If that does not help the cats may have a upper respitory infection or pink eye.

 Don't touch them with your bare hands sometimes the oils from human hands will cause the kittens eyes to do this . I have experienced that if you cont. To touch them they can go blind. Put gloves on or pick them up with a towel. Clean with a soft cloth and lukewarm water. Wait about 2 weeks after the eye is cleared up before you touch it again w/ bare hands.

 If you cannot take them to the vet, go to your local farm supply store and buy Terramycin ointment. Use several times a day till eye is completely better.