Wanxin Optical Glasses Academy - Report on the opening of the 31st Technician Class Yesterday was the first day of the 3

Wanxin Optical Glasses Academy - Report on the opening of the 31st Technician Class Yesterday was the first day of the 31st technician class of Wanxin Academy, and the head teacher of this technician class is Sun Shiqian, a teacher of Wanxin Academy. In the morning, Mr. Sun held a class meeting, and the students came to the stage to introduce themselves, and the humorous conversation and work experience sharing made them change from strange to familiar, sprinkled with joyful seeds all the way, and grew into flowers of unity! (Recommended reading: anti-blue light, anti-ultraviolet, concave shape, Teacher Sun Shiqian, the head teacher of Dulai Glasses.com, introduced themselves, and in the afternoon, Teacher Yuan Lijuan of Wanxin Academy brought you a high-quality course --- "Fundamentals of Ophthalmology".

Mr. Yuan vividly demonstrated the structure of the eye and related tissues, and compared the structure of the eye to the camera to explain the structure of the eye. Teacher Yuan Lijuan Teacher Yuan's knowledge points in the lecture 1 Cornea - lens: The cornea is the first gateway for light to enter the eyeball. Its refractive power is about 42D, which occupies 1/6 of the surface area of the eyeball, has a diameter of 11.5 mm, and is 0.6 mm thick in the center and 1 mm thick next to it.

Although it is commonly known as the "black eyeball", it is actually transparent and flawless, but the rest of the eyeball wall is like a camera obscura, and when people look through this layer of transparent tissue, they feel black when they look inside the dark eye. 2 Pupil - The aperture pupil is commonly known as "pupil", with a diameter of 2.5~3 mm.

Babies and the elderly have smaller pupils. When the light outside is strong, the pupils are constricted; When the light is low, the pupils become dilated so that the light in the eyes is always just right. Once out of balance, it is not properly exposed.

3 Lens 鈥?The fully automatic zoom lens lens is located behind the pupil iris and is a biconvex lens. Normal people can see both near and far, and all depend on the adjustment of the lens. If the regulatory function of the lens is out of balance, such as in old age, the lens cannot become convex, which is called presbyopia, or presbyopia; If the lens becomes cloudy, it's called a cataract.

4 Retina 鈥?The film retina is light-sensitive. The part of the macula that is most sensitive to light is called the macula. The cells that are sensitive to light are mainly cones and rods. Cones are mainly responsible for photopic vision and color vision, while rods are mainly responsible for scotopic vision.

5 Choroids 鈥?The camera's camera obsca is mainly composed of blood vessels, and therefore also has the responsibility of nourishing the eyeball. 6 Iris - the blades of the diaphragm, if the light is too strong, the pupil sphincter in the iris contracts, and the pupil is constricted; The light becomes weaker, the iris opening muscle contractions, and the pupil becomes larger.

Depending on the pigment in the iris, the iris appears in different colors. Caucasians have less pigment and are grayish-blue; Yellow people have more pigments and are brownish-yellow; Black pigments are black at most. 7 Sclera 鈥?The camera shell sclera protects the internal structure of the eyeball, and is white and opaque about 1 mm thick and occupies about 5/6 of the entire back of the eyeball.

Commonly known as the white of the eye, it is the sclera near the cornea and the transparent bulbar conjunctiva above it. After a day of study, the students had a deeper understanding of the deconstruction of the eye. In the future, we will continue to bring high-quality courses to present a feast of knowledge for students, so stay tuned for more exciting.

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