Aetna’s position on optic nerve and retinal imaging devices is based on the use of these devices as standard of care for documenting the appearance of the optic nerve head and retina, in place of retinal drawings or fundus photographs. In addition, optic nerve head imaging methods have been used as a noninvasive alternative to fluorescein angiography and slit-lamp biomicroscopy in assessing the retinal nerve fiber layer, although fluorescein angiography is also a sensitive test to detect leakage of incompetent retinal vessels. Because of the slow rate of progression of glaucoma, repeated optic nerve head imaging is not necessary more frequently than once every year.
Since almost 50% of optic neuritis is likely a result of a post-viral immune reaction, minimizing your risk of acquiring a viral respiratory infection decreases your risk of optic neuritis. It is impossible to totally avoid exposure to respiratory viruses, but research has shown that frequent hand-washing and attempting to not touch one's face without first washing one's hands decreases the incidence of the common cold . Teaching children to cover their mouths and noses when sneezing and instructing them on personal hygiene can also decrease the chances of upper respiratory virus spreading within families.