**3. Conclusion**

By optic nerve head OCT, different structures are being studied and measured. This imaging modality can analyze not only layers' thickness but also their contents.

Peripapillary OCT is widely used to detect optic neuropathies. Changes in peripapillary RNFL thickness are important in serial OCTs. This modality of imaging is available and enough reliable in diagnosis of optic nerve head diseases in routine clinical practice.

Although optic nerve head OCT is developing constantly, we cannot replace it with other tests including visual field analysis, especially in glaucoma patients.

A combination of OCT and OCTA findings will allow an understanding of complex pathologies involving the optic nerve head and peripapillary areas.
