What is the scientific study of hair called?

The scientific study of hair is known as trichology. This field specifically focuses on the structure, function, and diseases of hair and scalp. Trichologists are specialists who understand the biology of hair and can diagnose issues such as hair loss, scalp conditions, and other disorders related to hair.

Dermatology refers to the study of skin and its diseases, which encompasses a broader focus that includes but is not limited to hair. Cosmetology, on the other hand, is the broader field that encompasses beauty treatments, including hairstyling, skincare, and makeup application, but does not specifically focus on the scientific study of hair itself. Ophthalmology deals with the study of the eyes and is unrelated to hair. Thus, trichology is the most precise choice for the study of hair.