When I was taking care of the outdoor cats that Coco Puff came from, all the kittens had eyes like that, including him. And Mom took off w/them just as I had begun using the eye ointment. Like you, I was worried that they'd go blind and Dr. Lee told me not to worry, that Mom was taking care of them, that something in her saliva as she cleans them will help their eyes to heal. Sho 'nuf, she brought them back a couple of weeks later, eyes all healed. So do what you've been doing and try not to worry too much.

Blessings,
Mary