Step 1: A retractor is identified by its blade shape and the depth of field it serves; the one pictured has a wide angled blade for deep abdominal work.
Step 2: That description matches the Morris retractor, a favourite of surgeons and gynaecologists for retracting tissue in deep layers.
Step 3: It comes into play when an abdominal incision is opened and later closed, giving the operator clear vision and room to manoeuvre and repair structures inside the cavity.
Step 4: Since the Czerny, Richardson and lower lid retractors differ in design and purpose, the instrument shown is the Morris retractor.
\[\boxed{\text{Morris retractor}}\]