Visual Acuity: Specific vision abilities required include close vision, distance vision, color vision, peripheral vision, depth perception, and the ability to adjust focus (e.g., to read student work, observe students across a classroom, and monitor computer screens). Hearing Acuity: Ability to hear and understand spoken directions at a conversational level, as well as the ability to distinguish and interpret sounds (e.g., a whisper, fire alarm, or distress calls from students) in a noisy environment.