1-What ideas and beliefs led to the Armenian genocide?

2-In the period leading up to World
War I, how did nationalism unite or divide citizens?

Hdah.

The answer is

True blindness may be caused by trauma to the eye, severe conjunctivitis due to  ibr (infectious bovine rhinoceros) or pink eye or other infections, leptospirosis, lead poisoning, selenium toxicity, fungal infections, vitamin a  deficiencies, rabies, vitamin b12 deficiency, neoplastic of the orbit or  conjunctiva, cataracts, congenital malformations, etc.