How to look at the eye chart, how to look at the eye chart

Visual acuity is usually divided into two categories: distance vision and near vision. Distance vision, mostly using the international standard eye chart, this table is composed of 14 lines of different sizes, different opening directions of the E word, measured from, each line has a mark.

How to operate the eye chart of the person being examined: the line of sight should be parallel to the row, 5 meters away from the eye chart. The eye chart used in medical testing mainly checks the central visual acuity, which not only checks the foveal visual acuity of the macular area of the retina, so that the preliminary situation of visual function can be understood simply and quickly.

The examination visual acuity is generally divided into two categories: distance vision and near visual acuity, and the standard logarithmic visual acuity chart is mainly used in China (the second generation has been implemented in May 2012), which is composed of 12 rows of "E" characters with different sizes and opening directions; Measure from or from; Each line is marked, and the patient's line of sight should be parallel to the row, 5 meters away from the eye chart, and the distance between the eye chart and the person being examined must be correctly fixed, and the patient should be 5 meters away from the chart. If the indoor distance is less than 5 meters long, a flat mirror should be placed at a distance of meters to reflect the eye chart. Cover one eye first, and identify the direction of the "E" notch from top to bottom with one eye until it is no longer recognizable, and then record it.

Normal visual acuity should be above. If the subject cannot see either, he or she should move forward until he or she can see, and his visual acuity is "distance 5=visual acuity"; If you can't see it within half a meter, you can make the test subject identify the index, measure the hand, light perception, etc. Visual acuity is recorded according to the examination.

Near vision mostly uses the "J" near eye chart, the same method to identify the direction of the "E" word notch, until it can not be recognized, the near range can be adjusted by itself, normal near vision can see a line clearly at 30 cm, near vision examination is helpful for the diagnosis of refractive error.

A standard eye chart is made up of 12 rows of E in different directions.

The visual acuity test should be done at a distance from the eye chart, and the specific values should be checked according to the recommended values on the eye chart. Generally in the range of 3-5 meters.

When checking eyesight, a light source should be installed at the eye chart to avoid deviations caused by light to the vision test.

When testing visual acuity, the e-line should be tested step by step, and the direction of the e-opening should be compared with gestures.

At a distance of 5 meters, the standard E direction can be accurately judged as normal vision. Visual acuity should be measured in each eye individually.

The two eyes are tested separately and can be viewed from top to bottom or from bottom to top.

And the bottom line that you can see at the bottom is probably your current eyesight.

Of course, there will inevitably be errors in measuring your own eyesight, so it is recommended that if you want to accurately measure your eyesight, it is better to have accurate optometry in the hospital.

Nowadays, vision problems are getting younger and younger, and parents should pay attention to it once they find that there is vision loss.

Developing a proper eye habit is the first step.

It is recommended that children pay attention to eye hygiene and do not see for a long time in bright or dim light; Prevent the occurrence of terminal nystrain (e.g., dry eyes, dizziness, etc.).

When reading, the distance between the eyes and the book should be 30 cm, the posture should be upright, not lying down to read or walking while reading, and the light should be sufficient. Reading, writing, watching TV, and playing on the computer for 40 minutes in a row, you should close your eyes and rest and look into the distance for 5 minutes. 3 months or half a year to the hospital for reexamination; Pay attention to dietary habits and nutritional combinations to avoid chromium and calcium trace element deficiencies.

Prompt medication is the second step.

Generally, doctors recommend taking Joyeye Vision Nutrients, taking it with warm water, and insisting on taking it for a period of time, which can quickly improve your eyesight, and the younger you are, the easier it is for your vision to recover.

This is not necessarily, because unaided visual acuity has little to do with the actual power. However, the general vision can wear glasses about the degree, but everyone's adjustment power is different, so the prescription will be very different, you had better take him to the hospital for examination, you can be sure! If you are still in school, then you need glasses, wear them when looking at the blackboard, and if you have graduated, as long as you don't use your eyes too closely for so long, your vision can be restored.

About 3 meters from the eye chart, e"Letters gesture your hand to the right.

Just hit your hand down, the same below

m"Letters of your hand down big gesture.

There are many letters of different sizes, standing at a certain distance, you can see which letter at most and say how to gestur, your eyesight is the corresponding place of the eye chart.

The smallest line of words is the line of small words that you can see at a specified distance, the better your eyesight. There are comparisons on the table.

The right eye is myopic at 450 degrees and 100 degrees of astigmatism, and the left eye is myopic at 375 degrees and 75 degrees of astigmatism, which is already moderate myopia.

According to the description of your condition, it may be due to staying up late for a long time, excessive lack of exercise with your eyes, resulting in refractive error and other vision loss. It is recommended that you can choose an eye examination in a regular hospital to screen out your visual acuity, refractive capacity, intraocular pressure and fundus, and normal vision is generally at or above. The general way of writing is that r is the right eye and l is the left eye.

R for the right eye, L for the left eye; "+" means farsightedness, "- means nearsightedness."

S(SPH) stands for spherical value, which is the degree of myopia or farsightedness, which means 225 degrees of myopia.

C (cyl) represents the cylindrical value, that is, the astigmatism degree, which indicates the myopic astigmatism of 175 degrees.

a(ax) indicates the axial direction of astigmatism, and the axial direction is horizontal in most people.

The visual acuity test sheet is also the result of the optometry examination, and the correct interpretation of the optometry examination results depends on the above data. Under normal circumstances, the results of an optometry examination usually have the following data:

First, it is an English letter S, which represents the power of the spherical lens. Clause.

Second, it is the English letter C, which represents the power of the cylindrical mirror, that is, the degree of astigmatism. Clause.

3. There will be a 180 degree or similar degree behind the astigmatism, which is the axis of astigmatism. For example, the refraction result shows s s that it is -100, which indicates 100 degrees of myopia; c indicates 100 degrees, which is 100 degrees of astigmatism; The astigmatism is followed by the axis of the astigmatism, which is the correct way to interpret it. If you have vision loss, you should go to the hospital for an optometry examination as soon as possible.

Questions. <>

Is this a 600-degree myopia? Right. Questions.

Then why is it myopic 600, I can still see clearly within 100 meters, my friend has just been myopic for more than 400 and she can't see clearly.

If you can see clearly within 100 meters, it means that you are not nearsighted, and it is recommended that you take the test sheet to the hospital and ask the doctor.

Questions. It's just a small blur within 100 meters, my friend can still see it when he stands there, so it may be 600 degrees of myopia, is 600 degrees of myopia blurry within 100 meters without glasses?

Under normal circumstances, it is impossible, I am just more than 100 degrees of myopia, but if I don't wear glasses, it is blurry within 100 meters, but if I am 600 degrees of myopia, it is blurry within 50 meters, and I can't see clearly at all.

Questions. Ok, thanks doctor

You're welcome, if you are satisfied, please give a thumbs up, I wish you a happy life!

On the optometry sheet of the vision examination, there are generally the following data. The first is the English letter S, which represents the power of the spherical lens, which is the power of farsightedness or myopia. The second is the letter C, which stands for the degree of astigmatism.

There is also a degree after the astigmatism, which represents the axis of astigmatism. Therefore, if the eye has myopia, farsightedness or astigmatism, you need to go to a regular hospital for an optometry examination, so as to accurately understand the refractive status of the eye. If there is a refractive error, such as myopia or astigmatism, and it affects vision.

In this case, it is necessary to wear glasses as soon as possible to improve your vision, so as to maintain clear vision quality and avoid eye fatigue. Of course, in addition to eyeglasses, you can also choose to wear contact lenses. If you want to know more about the eyes, it is recommended to visit Aier Eye Hospital.

Aier Eye Hospital Group is China's first IPO listed medical institution, Aier Eye Hospital's more professional medical services not only allow patients to enjoy high-quality medical services, but also lower than the national high-level hospital charging standards, comfortable and elegant medical environment, equipped with all kinds of ophthalmic examination and surgical equipment, bringing together a large number of domestic and foreign ophthalmic professional and technical personnel. <>

Here's how to convert it:

Extended Modified Data:What the eye chart does:

An eye chart is a chart used to measure visual acuity.

The eye chart used in medical testing is to check the central vision, that is, to check the foveal visual acuity in the macular area of the retina, so that the preliminary situation of Naifan of visual function can be easily and quickly understood, which is of great significance for the clinical diagnosis of eye diseases.