As used in this article, “blind,” “totally blind,” “visually handicapped,” and “partially blind” mean having central visual acuity not to exceed 20/200 in the better eye, with corrected lenses as measured by the Snellen test, or having visual acuity greater than 20/200, but with a limitation in the field of vision such that the widest diameter of the visual field subtends an angle not greater than twenty (20) degrees.
As used in this article, “deaf person” means a person who cannot readily understand spoken language through hearing alone with or without a hearing aid, and who may also have a speech defect which renders his speech unintelligible to most people with normal hearing.