Which statement about laser settings is true for optimal treatment?

The statement that settings should always be decided based on tissue type is correct because laser treatments need to be tailored specifically to the characteristics of the tissue being addressed. Different tissue types, such as skin, hair, or vascular lesions, have varying properties that affect how they absorb laser energy. For instance, pigmented tissues absorb certain wavelengths more effectively than others, necessitating specific adjustments in laser settings like energy density, pulse duration, and wavelength. This customization minimizes risks and maximizes effectiveness, ensuring the treatment is safe and achieves the desired results.

In contrast, assuming that all settings are the same for every patient disregards the unique anatomy and condition of each individual, which is why that choice is inaccurate. The other options also lack the nuanced understanding necessary for successful laser treatments—lower settings may enhance visibility in some scenarios, but they won't necessarily provide effective treatment; higher settings can shorten treatment time, but they also carry a greater risk of damaging surrounding tissues if not managed correctly. Thus, understanding the diverse requirements based on tissue type is essential for optimal laser treatment outcomes.