Human Eye Characteristics

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The human eye can be classified into two segments: anterior and posterior segments. The cornea, conjunctiva, iris, ciliary body, aqueous humor and lens are includes in the anterior segment and sclera, choroid, retina, vitreous humor are includes in the posterior segment. The outermost transparent membrane of the eye is cornea such are the corneal epithelium, bowman's membrane, stroma, descemet's membrane, and endothelium. The anterior segment is a fluid of the eye which contains the source of nutrition to the crystalline lens and cornea. The iris sphincter and dilator muscles are help full to adjust the pupil size which regulates the amount of light entering to the eye.[1, 2] A ring-shaped muscle attached to the iris called ciliary muscles. It is important because contraction and relaxation of the ciliary muscle controls the shape of the lens. The choroid layer is located behind the retina and absorbs unused radiation.[3] The retina is a multi-layered sensory, light sensitive tissue contains millions of photoreceptors or photosensitive elements that capture light rays and convert them into electrical impulses. These impulses travel along the optic nerve to the brain, where they are converted into an image. A jelly-like substance known as vitreous humor, distribute between retina and lens.[1, 2] Fig. 1: Anatomy of Eye MANAGEMENT OF EYE DISEASES Conjunctivitis Bacterial…show more content…
The amount of active substance in aqueous humor after introducing the formulation to conjunctival sac is marked in specified time intervals. Using a syringe with needle, after intramuscular or intravenous anaesthetic injection which may contain, depending on application, ketamine hydrochloride, xylazine hydrochloride, or pentobarbital sodium, a sample of aqueous humor is taken in the amount of about

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