Acute Optic Disc Edema
The optic disc is elevated and its surface is covered by cotton wool spots and flame hemorrhages. The reflect explosion of damaged axons; the reflect explosion of vessels under pressure.
Although blurred optic disc margins and disc elevation can also be caused by a congenital , the cotton wool spots and hemorrhages tell you the disorder is acquired.
Optic disc edema is commonly caused by the four "I's":
Compression and toxins are other causes. You cannot differentiate one cause of optic disc edema from another on the basis of its ophthalmoscopic appearance! You must use non-ophthalmoscopic information, such as visual acuity or visual field defect, to make that distinction.
- increased intracranial pressure (papilledema)
- infiltration (by cancer)