They're a more purposeful, laid back dog, in most cases, than Pitbulls tend to be. There are exceptions, examples of both lazier Pitbulls and the rare American Bulldog with an inordinate amount of energy, but even then, it's not nervous energy, and such exceptions in no way disprove the rule.
Anterior blepharitis is commonly caused by bacteria (staphyloccus blepharits) or dandruff of the scalp and eyebrows (seborrheic blepharitis). It may also occur due to a combination of factors, or less commonly may be the result of allergies or an infestation of lice on the eyelashes.
Anterior blepharitis is due to inflammation of the lid margin around the lashes. Seborrheic blepharitis is similar to dandruff of the scalp. Allergies due to reactions from mascara, contact lens solutions, sprays, exposure to animals, environmental chemicals, or airborne allergens can also cause blepharitis.