At least they spawned. Mine wouldn't even do that much. But cool if you got a bunch of baby panda cories!
Eggs that are viable are clear. Eggs that are opaque and white are fungused. In warm enough temps, the eggs should hatch in 3-8 days, with apparently 4-5 being the norm. According to this corydoras catfish book, it's suggested to add aeration for the eggs and a fungicide. And to avoid bright lights. On the other hand, thousands of cories have hatched in home aquariums without any such steps being taken so I wouldn't worry too much.