Which would be considered a non-optical device?

• A. Talking books
• B. Audio alarms
• C. Large-print materials
• D. Braille books

Answer: (C)

Non-optical devices are aids that do not involve optical components to help someone see. They provide access to information or alerts through means other than bending or magnifying light with lenses. Large-print materials fit this idea because they don’t use any optical instrument to change how information is presented; they simply present the same content in bigger type, relying on the reader’s unaided vision under normal lighting. In contrast, the other examples convey information or warnings through sound or touch, which are non-visual modalities but still show the emphasis on non-visual access rather than using an optical device. So, this item is categorized as non-optical because it doesn’t involve an optical aid to improve vision.