Laboratory sciences is a branch of medical sciences, which focuses on the laboratory analysis of the blood, fluids and tissues of human body for disease diagnosis, treatment follow-up and preservation of health in the community.

The main mission of the field of laboratory science is to train people who can perform various tests on blood or other fluids and tissues in the clinical laboratories of hospitals and health centers with the specific knowledge they have learned and by using complex electronic devices and multiple methods. Do. The information and results obtained from these tests help the doctor in diagnosing the disease, the treatment process and maintaining the health of the society. Considering that this field is constantly changing and developing, graduates of this field should be trained in such a way that they have enough knowledge and skills to adapt to new technology.

This field is offered in various universities across the world under the title "Medical Technology". In 1976, Credentialing Agency National changed the name of the major to Medical Laboratory Sciences (MLS). Presently, the major is recognized as "Medical Laboratory Sciences" or "Clinical Laboratory Sciences". In the viewpoint of many experts, the new titles are more specific on the responsibilities and duties of the professionals in this major, who are known as "Clinical Laboratory Sciences Officers" (MLSO). In Iran, the continuous bachelor's level of laboratory sciences was initiated since 1968 in the universities of Tehran, Shiraz, Isfahan, Tabriz and Ahvaz, converted into apprenticeship and intermittent bachelor's level after the cultural revolution. Parallel to the advancements in medical sciences, diagnostic techniques by laboratory equipment have expanded as well, such that employees in this field exploit automatic and electronic devices with high accuracy and precision to perform laboratory tests.