What type of visual surveillance equipment is not relevant to an investigation?

The choice of colored contact lenses as a type of visual surveillance equipment that is not relevant to an investigation is correct because these lenses do not serve a functional purpose in surveillance. Their intended use is primarily cosmetic, aimed at altering the appearance of the wearer's eye color rather than enhancing their ability to observe or capture evidence in an investigative context. In contrast, night vision goggles, high-definition cameras, and body cameras are all tools specifically designed to facilitate the collection and documentation of evidence during an investigation, whether in low light conditions or for recording interactions in the field. Therefore, colored contact lenses do not support the objectives or needs commonly associated with visual surveillance in investigations.