[Differential diagnostics of chronic eye pain from a neurological perspective-What can also lie behind it].

Periorbital pain and pain in the eye may arise from nociceptive processes such as chronic ocular surface destruction and inflammation, from neuropathic processes or often from a combination of different mechanisms. An important differential diagnosis are primary headache disorders and other neurological diseases, for example of inflammatory origin, which trigger secondary pain. Chronic eye pain therefore requires interdisciplinary collaboration in the diagnostics and treatment.