DODMERB is a physical exam and an eye exam. There is no PT - that is covered in a separate PT test specific to the program to which you are applying.
The medical test is a standard physical exam. Be prepared to undress. There is also a reading component and you will be asked to read a paragraph out loud to assess for a speech disorder.
The eye exam is a separate trip to an eye doctor for an eye test.
There is also a medical history component to the DODMERB exam. This is an integral part of the process and it's critical that you complete it thoroughly and honestly. Get a parent to help you if necessary.