The various examples of the present disclosure are directed towards systems and methods for diagnosing brain health. An exemplary system includes a microscope, a processor, and a memory. The microscope outputs image data of a cornea of a patient. The memory has a plurality of stored code sections, which, when executed by the processor, include instructions for analyzing cornea image data to determine brain health. The instructions begin with receiving cornea image data from the microscope. The instructions then provide for determining at least one marker from the received cornea image data. The instructions then provide for outputting a brain health diagnosis based on the at least one marker.