MAXVIEW LCD Monitor Magnifier offers an elegant, lightweight way to make text and images easier to read on your screen. Optical-grade acrylic Fresnel lens increases what's on your LCD monitor up to double in size. Patented design features easy adjustability and a lightweight alternative to conventional heavy glass optical lens. Adjust screen magnification level by moving the magnifier closer or farther from the display - the greater the distance, the larger the image will appear. Light tint enhances the contrast for increased readability. Use fully assembled lens for 17" LCD monitors for general office use in a normal ambient light environment. It is not suitable for laptops. Lens measures 16-1/8" wide x 7" deep x 12-7/8" high.MAXVIEW LCD Monitor Magnifier offers an elegant, lightweight way to make text and images easier to read on your screen. Optical-grade acrylic Fresnel lens increases what's on your LCD monitor up to double in size. Patented design features easy adjustability and a lightweight alternative to conventional heavy glass optical lens. Adjust screen magnification level by moving the magnifier closer or farther from the display - the greater the distance, the larger the image will appear. Light tint enhances the contrast for increased readability. Use fully assembled lens for 17" LCD monitors for general office use in a normal ambient light environment. It is not suitable for laptops. Lens measures 16-1/8" wide x 7" deep x 12-7/8" high.