**6. Developing technologies**

Longer wavelengths OCT systems for better visualization of the choroid and retina are emerging. Major advances occur in the intraoperative iOCT; from a handheld portable probe used in infants and bed-ridden patients (it was used firstly in patient undergoing vitrectomy for better visualization of the macular disease [4]) to the microscope-integrated system (firstly demonstrated in the anterior segment surgeries) guiding the image during ophthalmic surgeries.

OCT-slit lamp incorporation also is advancing for close monitoring of chorioretinal diseases. The visible-light (Vis) OCT technology develops to capture retinal fine details. FF-OCT provides 2D enface high resolution images at different depth. The wide-field (WF) and ultrawide-field (UWF) increases the field of imaging to 40–55 degrees in WF up to 200 degrees in UWF allowing visualization of the periphery.

The AO-OCT improves the quality of images by using wavefront component and advanced software to compensate the ocular aberrations. At-home OCT is a self-imaging technique for better monitoring of the disease when compared to the in-office imaging.

Polarization-sensitive OCT analyses the tissue polarization and depolarization quantitively of the retinal pigment epithelial layers. Doppler OCT and, In-vivo retinal images developing technologies are coming [14].
