Optical resolution refers to the ability of an optical system, such as a microscope or camera, to distinguish between two closely spaced objects. It is determined by the wavelength of light used and the quality of the optical components. Higher optical resolution allows for clearer and more detailed images, making it essential in fields like biology and photography. In practical terms, optical resolution is often measured in terms of the smallest distance between two points that can still be seen as separate. Factors like lens quality and aperture size also play a significant role in achieving optimal optical resolution in devices like telescopes and cameras.