1. Introduction The eye is one of the most complex sensory organs in the body and is divided into two main parts, namely, the anterior and posterior segments []. The anterior segment is the front one-third of the eye which is composed of cornea, trabecular meshwork, conjunctiva, pupil, iris, ciliary body, aqueous humor, and lens, and the posterior segment is the back two-thirds of the eye that comprises the choroid, sclera, retina, macula, vitreous humor, and optic nerve [].