Optic Disc Photography is photography of the Optic Nerve. Most common use of the Optic Disc Photography is when a patient has a form of Glaucoma. Glaucoma is a disease that damages the Optic Nerve by and increase of the Intraocular Pressure (IOP). Most commonly when someones pressure is elevated it's due to not being able to circulate the fluid throughout your eye. So the all that pressure builds up and pushes back on the Optic Nerve and damages the fibers of the Optic Nerve, which causes your peripheral vision to start to deteriorate. Ultimately causing blindness. Once the Optic Nerve is damaged by Glaucoma you can never regain your vision. It's real important to get a check up atleast once a year with either an Optometrist or Ophthalmologist because if you start to have Glaucoma, you don't feel anything, even though your Intraocular Pressure (IOP) might be high and damaging your optic nerve, you won't be able to tell or feel any difference. Once your pressure starts to get up around 40mmHg then you may experience symptoms of severe headaches, nausea, and vomiting. The common IOP is below 20mmHg, usually. But it depends really on what doctors office you go to. Below are photos of different disease that has to do with the Optic Nerve.When you see the four images under one diagnosis, two on top, two on bottom, the top two will always be the right eye.