magnifier A lens of lens system designed to create a magnified image of an object and intended for visual observation, such as an eyepiece or jeweler's loupe. Related MicroscopyU Article Viewing and Projection Eyepieces The eyepiece (or ocular) is designed to project either a real or virtual image, depending upon the relationship between the intermediate image plane and the internal eyepiece field diaphragm. Explore how eyepieces can be coupled to the human eye or a camera system to produce images generated by the microscope objective.