Microscopes have been used for centuries as visual aides to assess small structures. BYK-Gardner offers a digital microscope along with the traditional microscope designs. The USB digital microscope has software capability to assess the appearance of paper surfaces. It can also be used as a digital microscope to store photos of physical property testing. The traditional microscope line is used in conjunction with specific test instruments. The stereo microscope is an optional accessory for the Automatic Cupping Tester. There is a portable precision microscope that is used to measure indentation hardness.