What are the methods of visual function testing and what is visual function?

Visual psychology, physics, and electrophysiology examinations.

Visual function tests include visual psychophysical chain information examination (such as visual acuity, visual field, color vision elimination, dark adaptation, stereo vision and contrast sensitivity) and visual rolling impulse electrophysiological examination.

Visual function refers to the eye's ability to focus on the source of things, gather friends, and blend images. When these functions are very good, there will be no visual fatigue and no myopia. Clear and long-lasting vision can only be achieved if the visual function is normal.

Qingliang Optometry Center specializes in visual function examination and recovery. Improve vision, prevent and control myopia, **amblyopia.

1. Binocular vision function:

aSimultaneous perception (simultaneous vision) refers to the ability of both eyes to receive images at the same time, and the minimum conditions for binocular vision when both eyes can see an object at the same time.

b Fusion image and fusion range refer to the ability of the large fiber mask to see the same part of the same and some different objects seen by the two eyes as a complete object c Stereoscopic vision is a three-dimensional spatial perception, which is a relatively independent eye vision function on the basis of the above-mentioned secondary visual function, and it is the function of the two eyes that can separate the two images and destroy the same image of Hu Ben.

2. Visual function inspection includes two aspects:

1) Visual psychophysical examination: visual acuity, distance visual acuity and near visual acuity;

visual field, central visual field and peripheral visual field;

Color vision, color blindness and FM-100 color vision test;

dark adaptation test;

Contrast sensitivity check.

2) Visual electrophysiological examination: including electrooculography (EOG), electroretinography (ERG), visual evoked potentials (VEP), multifocal electroretinography and multifocal visual evoked potentials.

What is Visual Function?

Visual function is simply a child's ability to see. If your child's visual function is abnormal, it means that your child's ability to see is deteriorating. The visual function involves two major functions: regulation and dispersion, one represents the eye's ability to focus on seeing far and near, and the other represents the ability of the eye to rotate inside and outside.

They work together to make it easy for our eyes to see at any distance. Data show that most children's myopia is caused by abnormal visual function.

Some symptoms occur when we have problems with the visual function of one eye, or when we have problems in both eyes at the same time. For example, when looking at things close to something, there is a sense of ghosting, double vision, blurring, the font is flowing and jumping, and the eyes are stretched and nervous.

What can happen to my child's visual impairment?

1. Poor coordination between the eyes.

Causes your child's strabismus or strabismus to worsen.

Difficulty concentrating, difficulty reading comprehension.

Prone to eye strain.

2. Poor eye control.

Missing words and wrong lines when reading.

It's hard to keep things steady.

3. Reduced eye focus.

It is easy to have blurred vision, and it is easy to have eye fatigue when reading and learning.

Decreased reading ability.

It is difficult to concentrate while reading.

Fourth, hand-eye ability and coordination ability deteriorate.

Reduced athletic ability.

The writing is crooked.

Fifth, the visual spatial perception ability deteriorates.

In the process of reading and writing, the positions of letters, words and numbers are reversed, and it is difficult to distinguish directions, and it is difficult to understand maps and icons.

6. Visual memory and attention deficit.

Difficulty in transcribing Liangsong, difficulty remembering what you see or read, poor reading comprehension skills, and low reading efficiency.

What is the significance of visual function testing?

The visual strength test is the most common examination to find out whether there is a problem in the eye, but in the past, the examination paid too much attention to the number of eyes, resulting in some children and adolescents' visual function problems not being detected in time.

Visual function represents the ability of our eyes to work together and is not perceived as intuitively as vision. Therefore, in the stage of children's vision development, it is very necessary to regularly check the visual acuity and binocular visual function, and it is recommended to add visual function examination every time the eyes are examined, so as to achieve early detection and early treatment, and minimize the impact on learning.

Methods to solve abnormal visual function - naked-eye 3D vision training

Naked-eye 3D visual function training can solve abnormal visual function and alleviate the accelerated growth of myopia. After the detection of the clinically blind, it was found that almost all myopic patients had varying degrees of visual dysfunction due to the dysfunction of accommodative response caused by ciliary muscle spasm, and visual function training was required. For example, people with good physical fitness will often exercise to reduce the risk of getting sick, while people with poor physical fitness need to exercise to strengthen their physique.

By looking at multi-frequency dynamic three-dimensional images, the ciliary muscle, lens, rectus muscle, and oblique muscle can be exercised at the same time, enhancing the adjustment ability of the eye (visual function), improving the amount of adjustment hysteresis, improving the visual nervous system and visual imaging quality, and making the eyes healthier with all-round eye movements.

The visual functions of the human eye include afterglow: light sensation, color alteration, shape sensation (visual acuity), kinesthetic (stereoscopic sensation), and contrast sensation (commonly known as visual function examination multidactyly kinesthesia (visual acuity)).

Visual function tests include visual mental health tests, such as visual acuity, vision, acretic adaptation, stereoscopic vision, contrast sensitivity, etc., as well as visual physiology.

PhotosensoryWhen visible light passes through the cornea, macromorphosis and vitreous body and is absorbed by photoreceptors on the retina, the photoreceptors produce a series of complex chemical changes, which are converted into hunger nerve excitation and transmitted to the brain through the optic nerve.

The last time I was in a Qiaolao professional optical shop for glasses, they gave me Pu Zhi Tong, and Shou Kuantan also gave me a check-up.

Visual features include.

Simultaneous viewing. Fusion Vision.

Three-dimensional.

Visual function tests do not include slit lamp examination.

1. The slit lamp in vivo microscope is composed of a light source projection system and an optical magnification system, which is a commonly used optical instrument in ophthalmology. It uses a concentrated light source to illuminate the examination area, which creates a strong contrast with the dark surrounding area, and then works with a binocular microscopic magnifier.

2. This examination can not only make the superficial lesions very clearly observed, but also use the fine gap light band to form a series of "optical sections" through the transparent tissues of each part of the eyeball, so that the different levels of the refractive interstitium and even the small lesions of the deep tissues can be clearly displayed.

Visual function tests include:

1. Vision: Mainly check the visual function of the eyes. An eye chart is an important tool used to check your vision.

2. Field of view: It is the range that photoreceptor cells can see when the eye is fixed to see a little bit.

3. Color vision: check the ability of cones to distinguish various colors, whether they are color weak or color blind.

4. Dark adaptation examination: When the eye enters the dark place from the light place, from the beginning of not seeing clearly to gradually seeing clearly, and finally recovering the best vision, the process is dark adaptation.

5. Visual sensitivity inspection: it is to detect the ability to distinguish under different sensitivities.

6. Aziluxin stereo vision: it is the ability to perceive three-dimensional space.

7. Visual electrophysiological examination: mainly to understand the function of various tissues in the eye, so as to correct the future development of vision.

Open the mobile phone WeChat; Click Discover, click Mini Program; Search for "check your eyesight"; Click on the eyesight applet; You can also directly search for "check eyesight" through the search button above WeChat; Enter the eyesight check applet and test your eyesight as instructed, detailed steps:

2. Click Discover and click Mini Program.

4. Click on the eyesight applet.

<>6. Enter the eyesight check applet and test your eyesight as instructed.

I didn't know you needed that method of vision testing.

First, naked eye visual acuity examination.

It is checked with an eye chart.

Second, corrected visual acuity examination is used to wear corrected glasses for examination, third, pathological examination is due to certain diseases that cause vision loss, fourth, visual function examination is due to.

It's not because of some reason for your poor eyesight, it's because of a function of your eye.