Eye 4.7 refers to the bare eye vision can see the visual acuity table 4.7, it and how many degrees there is no specific correspondence, the specific 4.7 is how many degrees, must be through the dilated pupil optometry check the specific degree. 4.7 myopia may be between 100-200 degrees, astigmatism is also in about 100 degrees. If it is farsighted, depending on the size of the individual’s ability to adjust, some 4.7 may have farsightedness of 100-200 degrees, and if the adjustment is stronger, even 300-400 degrees are possible. So the eye 4.7 specific how many degrees must be through the optometry to know, the nature of refractive error can not be guessed, must be through medical examination to come up with.