21. Axons form the RGCs will grow and extend towards the optic disc , where they exit the eye. 22. The retina and optic disc are normal. 23. Papilledema, or the swelling of the optic disc , can be a reliable sign that ICP is elevated. 24. Preflight images of normal optic disc . 25. The optic disc in a normal human eye carries from 1-1.2 million neurons from the eye towards the brain. 26. A posterior remnant may be seen where the artery left the optic disc , and is known as Bergmeister's papilla. 27. These vascular risk factors lead to ischemia ( poor blood supply ) to a portion of the optic disc . 28. This requires that other concerning findings such as papilledema ( swelling of the optic disc ) are not present. 29. In addition, green channel filtering can be used to detect center of optic disc in conjunction with double-windowing system. 30. Postflight right and left optic disc showing grade 1 ( superior and nasal ) edema at the right optic disc.
