A 0.2 visual acuity it may have a variety of ways of refractive type. In the case of myopia, which is also the more common type of refraction, it is probably myopia at 250-300 degrees and the level of vision is around 0.2. There may also be a high degree of hyperopia, which generally requires a farsightedness of 500-600 degrees before the visual acuity may drop to about 0.2. There may also be a combination of astigmatism, which is about 300-400 degrees of astigmatism, and the visual acuity may drop to about 0.2. Therefore, a vision of about 0.2 needs to go to a hospital for optometry to clarify the type of refraction so that corrective treatment can be actively taken.