Ophthalmology General 14bc3741 Weakest poion of sclera is A Limbus B Quator C Anterior to attachment of superior rectus D Behind rectus inseion High-Yield Explanation D i.e. Behind rectus inseion The sclera is thickest (1mm) at the posterior pole near the optic nerveQ and thinnest (0.3mm) just behind the inseion of rectus muscleQ.