<prompt> Thickest poion of sclera is ?Anterior to rectus muscle inseionPosterior to rectus muscle inseionPosterior poleLimbus  <response>: Ans. is c i.e., Posterior pole o The thickness of the sclera varies according to location : ? At the limbus, the sclera is 0.8 mm thick. Anterior to the rectus muscle inseions, it is 0.6 mm thick. Posterior to the rectus muscle inseions, it is 0.3 mm thick Thinnest poion. At the equator, it is 0.5 to 0.8 mm thick. At the posterior pole, it is greatest than 1 mm thick. 