What is an example of a Class 2 laser?

A laser pointer is an example of a Class 2 laser because it emits visible light and typically has an output power of up to 1 milliwatt (mW). Lasers in this class are considered to be safe for use under normal conditions because the human blink reflex generally protects the eyes from potential damage when exposed to such low levels of light. This characteristic allows Class 2 lasers to be widely used in applications such as presentations, where they help highlight information without posing significant risks to the user or the audience.

In contrast, other options, like low-level light therapy, often utilize lasers that may fall into different classifications based on their output levels and intended use, potentially exceeding the limits of Class 2. Industrial lasers and YAG lasers are typically classified as higher classes (Class 3 or Class 4) due to their higher power outputs, which can be hazardous and require protective measures to be in place when used.