(a) A child is classified as visually impaired when visual impairment, with correction, adversely affects a child's learning. The term includes both blind and partially seeing children. A child is visually impaired if:

(1) The vision loss meets the definition of legal blindness in the State of residence; or

(2) Central acuity does not exceed 20/200 in the better eye with corrective lenses, or visual acuity is greater than 20/200, but is accompanied by a limitation in the field of vision such that the widest diameter of the visual field subtends an angle no greater than 20 degrees.

(b) A child is classified as having a visual impairment if central acuity with corrective lenses is between 20/70 and 20/200 in either eye, or if visual acuity is undetermined, but there is demonstrated loss of visual function that adversely affects the learning process, including faulty muscular action, limited field of vision, cataracts, etc.