Your best source for  info on glaucoma is http://www.wills-glaucoma.org/
They have  weekly instant  messaging for  an hour when a glaucoma
specialist answers  questions and these sessions are written up later  so
you can review  all past sessions. Just put in a key word to find the topic
you want. You can also chat with other glaucoma  after the session with  the
Dr.Their archives cover many years. Click on "Chat room hi lights."  Someone
reviews your questions  to pick those that  are most relevant to the topic,
but you will find most will be answered in the archives of old question and
answer chats

Also put keywords in Google. If you want  images  add "images."
.