Physiology of the eye
The main function of the eye is to create clarity, a picture of things in our environment. These images are transmitted to the brain via optic nerve and rear viewing modes. The various tissues of the eye and its adnexa, thus designed to make the task easier.
The function of the eyelids
Tasks include: (1) eye protection against mechanical irritation, heat and bright light, and (2) pre-cry film, which is important for health care and clarity. Normal eyelid closure requires flexibility of muscle contraction in the orbicularis muscle (facial shape). The opening of the foreskin affects the upper, audible elevator given to the third cranial sensor.
Tear Film
The tear film has three layers: mucoid, water and oily layers. A layer of mucoid lies near the corneal epithelium. Improves wet areas of tears. It is produced by goblet cells in the epithelium joint. The aqueous layer is produced by the primary lacrimal gland in the orbit segment and the lacrimal gland resources found in the junction stoma. This fluid contains electrolytes, proteins, lysosomes, immunoglobulins, glucose, and dissolved oxygen (from the atmosphere). A layer of oil (the top layer of tear film) produced by Marian, the glands (altered sebaceous glands) of the eyelids. This oily layer helps to keep a straight column of tears between the upper and lower lids and prevents excess evaporation. Tears often flow into the drainage system (lower and upper), calculi (lower and upper), common cuniculus (open lacrimal sac) and canal (odor).
Cornea
The main function of the cornea is refraction. To perform this function, the cornea needs the following:
• transparency
• Smooth and standard surface
• The right force is the same circle
• an appropriate indicator of confusion.
Corneal visibility given structural and physical features:
1. Anatomical:
• absence of keratinization of the epithelium
• solid packing of epithelial cells
• a layer of mucus that provides a smooth surface
• membrane homogeneity - Bowman's and Descent
• Normal structure of the LaBelle cornea, (the same collagen fibers inside each Pamela, and LaBelle, almost invisible). A common productive file for diffraction, nettle
• deficiency of stromal corneal cells, commonly found within LaBelle,
• internal area - lack of blood vessels.
2. Nature
• Active dehydration of Na + / HCO3 - Exhale, found in the corneal endothelium. This dehydration is compounded by a body barrier provided by the corneal epithelium and endothelium.
Angry jokes
The jars contain a clear electrolyte solution (in water) that fills the space between the cornea and the lens. The average dose is 0.3 ml. Its function is to nourish the lens and cornea. Aqueous is made up of active secretion and ultrafiltration from ciliary processes to the posterior chamber. The fluid enters the chamber through the student, circulates in the inner chamber and passes through the function of the trabecular line mesh in the schema canal, blood vessels and connected episcopal arteries. Aqueous usually contains less protein, but higher concentrations of ascorbic acid are compared to plasma. Inflammation of the internal urea leads to protein leakage from the iris circulation in water (= plasmoid aqueous).
Vitreous body
The vitreous has a three-dimensional collagen network with inner chambers filled with a molecule of hyaluronic acid, which is able to absorb large amounts of water. Vitreous is rarely flowing but is gradually found in small amounts in water. There has been a meltdown of gels over the years, with cracked pieces to make flats. This corruption happened at an early age in my life.
Lenses
The lens, like the cornea, is visible. The avascular icon also relies on liquid food. It has a very wide capsule, i.e. it prevents molecules (e.g., proteins) from entering or leaving them. The lens continues to grow throughout life, new lens fibers are produced internally and externally, persisting within the nucleus for years. The lens contains 65% water and 35% protein. The water content in the lens decreases with age and the lens becomes easier to adjust. The lens is suspended in the ciliary body is a module, located in the ciliary body, and placed in a lens capsule near the equator.
Ciliary Body
The ciliary muscle (inside the ciliary body) is the weight of a smooth muscle, which runs deep into the ground and attaches to the front of the scleral spur. It consists of two main parts:
1. Longitudinal (meridional) wires - from the outer layers also appear as a scleral Jump and place on the choroid. The separation of this part of the muscle brings traces of a series of mesh, choroid and retina.
2. Round threads - from its inner part, running round. The journey continues with soldiers within the middle student, leading to all modules.
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