Sounds like the cloudy part you have was misdiagnosed. A lot of doctors in America that are of the older generation tend to never have seen it before and they misdiagnose it more often than not. Typical since it only happens to 1 of 10000 people with ambliopia. It's a cancer that is benign meaning it stopped growing or does not harm the area. What happened was that when you were in your mothers womb you over developed your optic nerve. Most people stop producing the optical nerve but you continued to do so. Sounds like it should have some type of advantage but unfortunately it doesn't and usually  may be associated with ipsilateral myopia, amblyopia, strabismus and other ocular conditions. Strabismus was found in 66% with MRNF in one review. Visual acuity is usually not affected; however, if a sufficient number of myelinated fibers are present a relative scotomas may develop depending on the location of the MRNF.