Ophthalmology General e66fee0e Thinnest poion of sclera ? A Anterior to rectus muscle inseion B Posterior to rectus muscle inseion C Posterior pole D Limbus High-Yield Explanation Ans. is.b, Posterior to rectus muscle inseion Thinnest poion of sclera- Posterior to inseions of rectus muscle. Thickest poion of sclera- Posterior pole.