OIS, or Optical Image Stabilization, is a technology used in cameras and smartphones to help eliminate camera shake and improve image quality. Synonyms for OIS include image stabilization, vibration reduction, and shake reduction. These technologies work by either physically shifting the lens to counteract movement or by using software to adjust the image to compensate for movement. Other related terms include electronic image stabilization, digital image stabilization, and hybrid image stabilization. OIS is becoming increasingly popular in the photography and video industry, as it helps to produce clearer and more professional-looking images.