Which of these is a non-optical aid for visually challenged individuals?

Options

A. Bifocal lenses
B. Contact lenses
C. Telescopic aid
D. Audio books

Answer

To determine which of the given options is a non-optical aid for visually challenged individuals, we can follow these steps:

### Step 1: Understand the Terms
- **Optical Aids**: These are devices that assist with vision. They are designed to enhance or correct visual perception.
- **Non-Optical Aids**: These aids do not involve vision directly and can assist individuals through other senses, such as hearing or touch.

### Step 2: Analyze the Options
- **Bifocal Lenses**: These are optical aids designed to help individuals see better by correcting vision at different distances.
- **Contact Lenses**: Similar to bifocal lenses, these are also optical aids that improve vision.
- **Telescopic Aids**: These devices are used to magnify distant objects and are classified as optical aids as well.
- **Audiobooks**: These are recordings of books that can be listened to. They do not involve vision and are designed for individuals who may have difficulty seeing.

### Step 3: Identify the Non-Optical Aid
From the analysis:
- Bifocal lenses, contact lenses, and telescopic aids are all optical aids.
- Audiobooks are non-optical aids since they assist visually challenged individuals through hearing.

### Conclusion
The non-optical aid for visually challenged individuals is **Audiobooks**.

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