Ophthalmology is a part of Medicine and Surgery Which Dispenses with the Analysis and Remedy of Eye Disorders. An Ophthalmologist is a professional Expert in Ophthalmology.
Above the eye socket is the Eyebrow, there are eyeballs in the eye socket, eyelids on the upper and lower edges, and eyelashes on the edges of the eyelids. The eyeball is composed of the iris and Sclera, and the pupil is in the center of the iris. The cornea is a transparent membrane connected to the sclera. Behind the iris is the lens, which is connected with a slender tendon, and behind it is the vitreous.
The Eyeball Wall
Can be divided into outer, middle and inner triple membranes, and the outer membrane is the cornea and sclera. The media is the iris, ciliary body and choroid. The ciliary body is connected to the root of the iris and contains ciliary muscle. The choroid is a structure that is rich in blood vessels and pigments and adheres to the retina. The retina is the inner membrane of the eyeball wall, which contains a large number of photoreceptors and nerve connecting cells.
The Outer Sclera of the Eyeball
And the inner surface of the eyelid are covered with thin conjunctiva, and the outside of the eyeball is connected with small muscles. Behind the eyeball is the optic nerve, which contains blood vessels that supply blood to the eyeball.
Light Transforms Images
When the external image enters the eyeball through the pupil with light, it stimulates the receptor cells on the retina, and the cells transmit photoelectric signals to the surrounding connecting cells. The processed nerve impulses are finally transmitted to the visual center of the brain through the optic nerve, forming a picture. Like.
The Pupils Become Larger and Smaller
The size of the pupil is controlled by the sphincter and opener muscles in the iris. When the eyes are exposed to strong light, the sphincter muscles contract and the pupils become smaller. On the contrary, when the light is dim, the open muscles contract, causing the pupils to dilate.
The muscles of the eyeball are attached to different positions of the eyeball. When the oculomotor muscle in a certain place contracts, it will draw the eyeball toward this direction. Sometimes complex eye movements require more than two eye moving muscles to contract together.
Common Diseases of the Eye:
- Acute Glaucoma
- Chronic Glaucoma
- Acute conjunctivitis
- Chronic conjunctivitis
- Retinal detachment
- Corneal ulcer
- Refractive abnormality
- Night blindness
- Red-eye syndrome
Common symptoms of the eye:
- Eye Pain
- Dry Eyes
- Visual Disorders
First aid Eye injuries are:
- Foreign body in the eyes
- Chemicals eyes
- Eye hit
Paying attention to eye hygiene is one of the important ways to prevent eye diseases. Don’t make your eyes tired, don’t read in dimly lit places, wear eye protection glasses when working under strong light, and don’t abuse gauze to cover your eyes or Use eye drops indiscriminately.