Rule 8. (1) A visual impairment shall be determined through the manifestation of both of the following:
(a) A visual impairment which, even with correction, interferes with development or which adversely affects educational performance. Visual impairment includes both partial sight and blindness.
(b) One or more of the following:
(i)A central visual acuity for near or far point vision of 20/70 or less in the better eye after routine refractive correction.
(ii)A peripheral field of vision restricted to not more than 20 degrees.
(iii) A diagnosed progressively deteriorating eye condition.
(2) A determination of impairment shall be based upon a comprehensive evaluation by a multidisciplinary evaluation team, which shall include an ophthalmologist or optometrist.
(3) If a student cannot be tested accurately for acuity, then functional visual assessments conducted by a teacher certified in visual impairment may be used in addition to the medical evaluation for determination of impairment.
(4) For students with visual impairment who have a visual acuity of 20/200 or less after routine refractive correction, or who have a peripheral field of vision restricted to not more than 20 degrees, an evaluation by a certified orientation and mobility specialist shall also include in the report a set of recommended procedures to be used by a mobility specialist or a teacher of students with visual impairment in conducting orientation and mobility training activities.