I was diagnosed with optic nerve atrophy when I was 8 yo. I was diagnosed with cerebellar ataxia a few years ago. So bad eyes and bad balance. Has anyone had success with these conditions or can add a word of advice?

1. Perhaps this book may help:
https://www.amazon.com/Healing-Voltage-Eye-Diseases/dp/1463571933
What causes optic nerve atrophy?

ONA causes include: tumor, trauma, decreased blood supply (ischemia) or oxygen supply (hypoxia) causing swelling, heredity, hydrocephalus, toxins, infection, and rare degenerative disorders. Onset can be from birth through adulthood.
https://aapos.org/terms/conditions/81

Hydrocephalus is a condition in which there is an accumulation of cerebrospinal fluid (CSF) within the brain.[1] This typically causes increased pressure inside the skull.[1] Older people may have headaches, double vision, poor balance, urinary incontinence, personality changes, or mental impairment.[1] In babies there may be a rapid increase in head size.[1] Other symptoms may include vomiting, sleepiness, seizures, and downward pointing of the eyes.[1]
https://en.wikipedia.org/wiki/Hydrocephalus

Since you mention balance issue as well Hydrocephalus may be your cause.
https://www.spooky2.com/forums/viewtopic.php?f=12&t=8598&p=77177&hilit=Hydrocephalus#p77177

In Post #2 I mention the use of a DC voltage to apply a charge around the eye area.
https://www.spooky2.com/forums/viewtopic.php?f=18&t=8490&p=76070&hilit=blind+eye#p76070

Regular detoxing of neuro toxins using the Terrain protocol is something I would do/
Running Inflammation type programs also.
Consider running programs for multiple sclerosis as well.

2. Re using contact around the eye.

There is a warning not to use contact treatments above the shoulders. 

Should you decide to do this at you own risk, I would try low odd voltages to start with say 5V and step up by say 2v at a time until you find the voltage needed to get the optic nerve to flash when you apply the negative probe around the eye as demonstrated in the Joe video.

Make sure you have the POSITIVE LEAD in you RIGHT HAND so that it minimizes the amount of current going through the heart. 

For more details, please check the link:
https://www.spooky2.com/forums/viewtopic.php?f=18&t=9073