American Board of Ophthalmology (ABO) Practice Exam

Which lens color level is the darkest?

1. Level 1

2. Level 3

3. Level 5

4. Level 7

The correct answer is: Level 5

In the context of lens colors, particularly for sunglasses and other optical devices, lens color levels are often used to denote the level of tint or darkness. The higher the numerical value assigned to a level, the darker the lens will typically be. Level 1 represents a very light tint, suitable for low-glare situations or for indoor use. As the levels increase, so does the darkness of the lens. Level 3 generally provides moderate protection against glare and is often considered suitable for driving and outdoor activities. Level 5 offers a darker tint, suitable for very bright conditions like those found at the beach or in snowy environments. Level 7 is the darkest option and is designed for extremely bright conditions where maximum glare reduction is necessary. It is often used for activities such as skiing or deep-sea fishing where protection against sunlight is critical. Understanding these levels helps in determining the appropriate lens based on environmental conditions and personal comfort. This categorization allows users to select lenses that meet their needs while ensuring optimal visibility and protection from harmful UV rays.