Table 1.

Materials required and cost to make the T3 Retcam

1. Smartphone and hard cover/case

2. Condensing lens (20D)

3. Hand sanitizer plastic bottle (preferably 15-20 cm and cylcindircal) : Recycled OPD material

4. 11 blade (one in number ): 5 rupees

5. Superglue (one in number): 5 rupees

• Total cost of T3 Retcam (excluding 20D lens and smartphone with cover): 10 rupees

• Optional:

1. Black sand paper/matt black chart paper*: 20 rupees

2. Universal smartphone adapter*: 750 rupees