A Narrative Review on Confocal Laser Scanning Microscopy: Principle, Applications, Advancements and Challenges

Confocal Laser Scanning Microscopy (CLSM) is an advanced imaging technique used in various fields. It offers several advantages over conventional microscopy due to its high resolution and ability to collect three-dimensional data using optical sectioning. While the resolution in confocal microscopy is comparatively lower than that of electron microscopy, it has effectively bridged the gap between these two imaging techniques. In the medical field, CLSM has a wide range of applications, including the diagnosis and treatment of corneal diseases, the study of biofilms and the diagnosis of various types of cancers, as well as the viral pathogenic cycle, including that of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). CLSM is also beneficial in food technology. The present review synthesises the current knowledge on CLSM, encompassing its applications, technological advancements and limitations. A comprehensive search of relevant databases identified studies and articles published by September 2023. The findings highlight CLSM’s versatility, with applications ranging from cell biology to materials science, while also addressing technical challenges and future prospects.