Model iS3 is a 3 Step Changer Slit Lamp designed with a Galilean-type microscope for precise and clear visualization. It features a revolving drum that allows 3-step magnification change of 10x, 16x, and 25x, making it versatile for different examination needs. The optical resolution is 2700 N lp/mm (200 lp/mm), ensuring high-quality imaging. It comes with 12.5x eyepieces and a 10° angle between eyepieces for comfortable viewing. The pupillary adjustment ranges from 52 mm to 80 mm, making it adaptable for various users.