Thinnest pa of scelra is:
The sclera is much thicker behind than in front; the thickness of its posterior pa at the macula is 1 mm. The sclera thins to 0.3 mm just behind the recti muscle inseions (about 6 mm behind the corneoscleral junction) and this area is extremely vulnerable to traumatic rupture. In fact this is the most common site of a ruptured globe due to blunt trauma.At the equator the sclera measures 0.4-0.5 mm in thickness.It is thickest behind, near the entrance of the optic nerve. However it is weakest at the entrance of theoptic nerve.
At the entrance of optic nerve
Site of entrance of ciliary nerves
Corneoscleral junction
At the inseion of recti muscles