[Solved] _______________________ is a diffuse apprehension that is vague in nature and is associated with feelings of uncertainty and helplessness. Focus Controls: Features or devices on imaging equipment, such as cameras or microscopes, allowing the operator to adjust the clarity and sharpness of the image. Microscope: An instrument used to see objects that are too small to be seen by the naked eye, enhancing the resolution and visual perception of the observer. Oculars: Refers to the eyepieces on microscopes or other optical instruments, aiding in magnification and observation. Physician's Office Laboratory: A small lab located within a physician's office where various tests are performed on-site to aid in the quick diagnosis and treatment of patients.