Optical imaging is a field of research that focuses on the development and use of imaging techniques that utilize visible light and other forms of electromagnetic radiation in the optical range to capture detailed images of biological tissues, cells, and structures. Optical imaging techniques include microscopy, spectroscopy, and imaging modalities such as optical coherence tomography and fluorescence imaging. These techniques are widely used in biological and medical research for studying cellular processes, diagnosing diseases, and monitoring treatment responses. Optical imaging offers high resolution, non-invasive imaging capabilities that can provide valuable insights into biological processes at the cellular and molecular level.