My first chin got that sometimes when he dustbathed. Took him to the vet and the vet said it was just eye googies like people get and that the important eye things to look out for is excessive watering, tearing, and squinting.
Yep, probably just from the dust. I wouldn't worry. My eyes water after they dust, I'm sure theirs do too. If it gets red around the outside or gets really watery or greenish pus then worry, but this looks normal.