SUNGLASSES: LENS CATEGORIES
| Category | Lens Tints | Suitable For |
| 0 | None or very light tint | For aesthetic, fashion or comfort purposes |
| 1 | Light tint | Weak levels of sunlight |
| 2 | Medium tint | Average levels of sunlight |
| 3 | Dark tint | For use in strong sunlight, including light which is reflected off water or snow |
| 4 | Very dark tint | For use in exceptional levels of strong sunlight. Not suitable for drivers and road users |
