*2.2.1 Role of OCT*

In patients with media clarity, an optical coherence tomography (OCT) scan can be of utmost value to assess the vitreomacular anatomy, extent of macular detachment, status of fovea, vitreopapillary traction, vitreomacular traction, tractional schisis, epiretinal membrane and macular edema. It can also help in identifying progression of detachment on follow-up. Patients with ERM or macular edema can also be benefited with ERM and internal limiting membrane (ILM) peeling.

**Figure 1** shows pre-operative and post-operative OCT and fundus photo comparison. This is a patient with PDR with florid NVD and NVE with VMT and CME with vitreoschisis with vitreopapillary traction pre-operatively. Post-operative OCT shows resolution of all traction and edema with temporal retinal thinning.

A widefield OCT helps in better understanding of the vitreomacular anatomy in the centre as well as mid periphery. It can also help in identifying the plane of dissection and thus help planning the site of initiation [6].

#### **Figure 1.**

*Preoperative and postoperative colour fundus photograph and OCT scans of a patient with PDR with florid NVD and NVE with VMT and CME with vitreoschisis and vitreopapillary traction.*
