*2.2.2 Role of ultrasound*

In patients with dense media opacities like cataract or vitreous haemorrhage, a pre-operative ultrasound evaluation is warranted. This will help to understand the status of posterior hyaloid, location of focal attachments of posterior hyaloid onto the retina, any traction on retina, and co-existing retinal detachment. **Figure 2** shows ultrasound image of a patient with vitreous haemorrhage with subhyaloid haemorrhage with thickened and incomplete hyaloid separation.

Systemic evaluation and stabilisation of the patient is important before taking up for surgery. In patients who are on haemodialysis, a pre-operative heparin-free dialysis should be recommended in order to reduce the chances of intraoperative and post-operative bleeding.
