<prompt> Most serious type of neonatal conjunctivitis which can cause neonatal blindness -N. gonorrhoeaeChlamydia trachomatisStreptococcus pneumoniaePseudononas  <response>: The most dangerous cause of neonatal conjunctivitis is N. gonorrhoeae due to its potential for invading intact corneal epithelium and causing blindnesss Ref: Clinical ophthalmology 3rde p.661 