What is the purpose of a ‘cut-off filter’ in laser treatments?

The purpose of a cut-off filter in laser treatments is to block unwanted wavelengths and protect surrounding tissues. In laser therapies, different tissues respond to specific wavelengths of light. A cut-off filter is designed to allow only certain wavelengths, such as those emitted by the laser being used, to pass through while absorbing or reflecting others. This is crucial in minimizing harm to nearby tissues that are not intended to be treated by the laser.

By filtering out the unnecessary wavelengths, the cut-off filter ensures that only the therapeutic light reaches the target tissue, which can result in more effective treatments and reduced side effects or damage to surrounding areas. It helps to maintain the safety and efficacy of laser procedures, making it an important component in laser technology.