Hello everyone, I believe many netizens don’t understand the visual acuity chart, including the naked eye visual acuity chart 2023, but it doesn’t matter. Next, I will share with you about vision. For some knowledge points about the comparison table and the naked eye vision comparison table 2023, you can pay attention to the collection so as not to find it next time. Let’s get started!
Contents of this article
- How to look at the red and green comparison table of optometry
- Naked Vision Comparison Chart 2023
- What is the appropriate height of the children\’s vision chart from the ground
- The eyesight of a little cat
- How to fill in the vision of a civil servant
1. How to look at the red and green comparison chart of optometry
This depends on the balance of your eyes. Which side of the text is clearer or the same?
2. Naked eyes Vision Comparison Chart 2023
Normal people\’s naked eye visual acuity is 1.0 or 5.0. If the absolute emmetropic eye is measured, the diopter should be 0 degrees without any refraction. The light is not straight.
Taking a one-point eye chart as an example, the standard visual acuity should be 1.0. If it is a five-point eye chart, the standard visual acuity should be 5.0. So an adult\’s normal vision is either 1.0 or 5.0. If you really want to measure how many degrees it is, the absolute emmetropic eye in the most ideal state should be 0 degrees. Without any refractive error, it is an absolute emmetropic eye. Only then can the naked eye vision be 1.0 or 5.0. Of course, in life There is no such absolute emmetropic eye. Generally, if the refractive error is very small, the naked eye vision can be normal.
3. What is the appropriate height of the children\’s vision chart from the ground
Visual acuity Table placement height: The 1.0 (or 5.0 on the logarithmic visual acuity chart) line should be positioned appropriately and parallel to the subject\’s eyes.
1. In other words, it is notA unified standard height depends on the situation during the test: posture, sitting or standing; it also depends on the height or sitting height of the person being tested.
2. It is generally best to choose a sitting position, and then there is a seat that can adjust the height. Adjust the seat to the middle position and find a person of moderate height to sit on it. Then measure the height from his eyes to the ground, which is the height from the 1.0 line on the eye chart to the ground.
3. The international standard eye chart uses the word E as the visual mark. The stroke width and spacing are both 1 minute of visual angle. The side width of the visual mark E is The viewing angle is 5 minutes, the width of the gap is 3 viewing angles, the optotypes are arranged in 12 rows, the increasing rate of the optotypes is the number of sets, and the visual acuity is an arithmetic progression (0.1~1.0), recorded in decimals.
4. Vision of kittens
1. Newborn The eyesight of kittens is very poor. They will not be sensitive to light until two to three days after birth, and they will gradually see things around them after a week. Therefore, cat lovers should not be impatient and wait patiently.
2. Secondly, the resistance of newborn cats is generally very low, so it is best to let them stay with the mother cat and provide them with comfort. living environment.
5. How to fill in the vision application form for civil servants
Corrected vision generally refers to The visual acuity measured by wearing glasses, generally 5.0 is the standard visual acuity;
Naked visual acuity generally refers to the visual acuity measured without wearing glasses. If you are not myopic, fill in 5.0. If you are myopic, fill in 5.0. Just refer to the corresponding visual acuity in the old and new visual acuity comparison chart.
This ends the content about the vision chart. I hope it will be helpful to everyone.
