![]() The two particularly important tendon sleeves are the one around the tendons of the medial and lateral rectus muscles. These sleeve-like projections are important as they attach to the surrounding structures of the orbit, thus limiting the actions of the extraocular muscles. The tendon of each muscle penetrates the fascial sheath, which reflects back on their tendons, forming a short sleeve around them. The outer surface of the Tenon’s capsule provides the attaching points to the extraocular muscles. The inner surface of the fascia is smooth and is separated from the surface of the sclera by a potential space called the episcleral space. Anteriorly, it attaches to the sclera, while posteriorly it fuses with the meninges that wrap the optic nerve. The Tenon’s capsule is a fascial sheet that forms the socket around the eyeball. The role of refractive structures to bend the direction of the light that falls onto the eye and focus it onto the retina. Together with the cornea and aqueous humor, the vitreous body and lens belong to the refractive media of the eyeball. The inside of the eye contains the two refractive structures of the eye called the lens and vitreous body. These three layers comprise the circular outline of the eyeball. ![]() The retina itself is divided into two layers an outer, pigmented layer, and an inner neurosensory layer. The nervous layer, also known as the retina, which is the innermost layer of the eyeball.From posterior to anterior, they are the choroid, ciliary body, and iris. ![]() It consists of three parts that are continuous with each other. The vascular layer, also known as the uvea or uveal tract.The cornea is a transparent layer that is anteriorly continuous with the sclera, occupying the anterior one-sixth of the eyeball. The sclera is an opaque layer which surrounds the posterior five-sixths of the eyeball. The fibrous layer, which consists of the sclera and cornea.The eyeball consists of three distinct layers. Vascular layer (choroid, ciliary body, iris) Spheroidal sensory organ that receives the visual stimuli and conveys them to the brain This article will discuss the anatomy and function of the eyeball. the conscious perception of a human’s surroundings. After the processing in the cerebral cortex, the visual stimuli become visual information, i.e. The posterior pole of the eyeball is connected with the optic nerve (CN II), which conveys the information from the retina to the brain. Functionally, the most important layer is the retina, which receives the external visual stimuli. The eyeball consists of three layers fibrous, vascular and nervous ( retina). These remarkable features of our eye are enabled by the complex structure of the eyeball. The average human eye can see around 100 different shades of color and has a resolution that equals 576 gigapixels. In the brain, the information from the eye is processed and ultimately translated into an image. The main function of the eye is to detect the visual stimuli (photoreception) and to convey the gathered information to the brain via the optic nerve (CN II). The eye is a highly specialized sensory organ located within the bony orbit.
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