Is microcrystalline cellulose powder harmful if it gets in your eye?
Generally, it is not harmful for your eye. Because it is stable
in the water, dilute acid and etc. so you needn't worry about it
will do something in the chemical way. But its size is very small,
so you need to wash it using cleaning water, and make sure that it
is all out of your eye. The answer is based on my knowledge. it may
not so correct.