Yes, blepharitis can be classified as staphylococcal, seborrhoeic, parasitic or mixed according to the wikipedia. As we all know, there are invisible germs in the air, let alone the dust mites. Once our immune system can not function well, certainly, we will suffer various bacterial eyes diseases based on individual sensitivity. So, dust mites can cause blepharitis not by itself, but the bacteria in them. As blepharitis sucks and can not be cured completely, it entails that we must maintain a good hygiene and clean up the room regularly to decrease the bacteria. Further, if your had had such disease last year, or even several years ago, it would have come back without some particular reasons. Well, you need to care your eyelids constantly.