The main purpose of Chlamydia trachomatis antigen detection is to see whether there is Chlamydia trachomatis infection. If the test result is positive, it indicates that Chlamydia trachomatis has been infected. The only infected cell of Chlamydia trachomatis in the human body is the conjunctival cell of the human eye, which will lead to the production of trachoma, that is, a kind of chronic conjunctivitis.