[Bifocal Lens]: Bifocal lens, fast and accurate positioning; the lens layout is more precise, and small lens outlines can be projected clearly [Exquisite Appearance]: The display screen has no visual difference or deformation, the lens layout is accurate, the bifocal lens positioning is fast and accurate, and transparent projectiles can also be placed in small lenses [LED Lighting]: Using LED lighting, the field of view is wider, the image is clearer, the positioning is precise, the work efficiency is high, the operation is convenient, and the service life is long [Extra Large Observation Window]: It is more intuitive to directly observe the lens through the reflector on the dial. Rotate the fixed suction cup so that the suction cup is more accurately fixed in the center of the lens [Application]: Two types of suction cup heads are replaceable, suitable for optical shops, vision care centers, hospitals and optometry training centers