Interpretation of visual acuity figures in the visual acuity chart of Guangzhou Zhongshan Eye Hospital
The visual acuity chart is an important tool to evaluate a person's visual acuity. The visual acuity chart of Guangzhou Zhongshan Eye Hospital is a common visual acuity test form used by Guangzhou Zhongshan Eye Hospital. The correct interpretation of the visual acuity numbers on the visual acuity chart is essential for assessing vision and diagnosing visual problems. The following will elaborate on how to interpret the vision figures on the vision chart of Guangzhou Zhongshan Eye Hospital from four aspects.
1. Meaning of visual acuity number
The visual acuity figures on the visual acuity chart of Guangzhou Zhongshan Eye Hospital are usually expressed in fractions, such as 6/6, 6/12, 6/9, etc. These scores are determined by comparing the size of the letters the subjects can see with the standard of normal vision. The numerator of the number indicates the distance that the tested person can see letters clearly, and the denominator indicates the distance that normal people can see letters of the same size at the same distance.
For example, if a person's vision is recorded as 6/6, it means that the person can see the letters that normal people can see at a distance of 6 meters. If the vision is recorded as 6/12, it means that the person needs to be twice as far away from the letter (12 meters) to see a letter that a normal person can see at a distance of 6 meters.
Therefore, the larger the visual acuity number is, the better the testee's visual acuity is, and the smaller letters can be seen clearly. The smaller the number of visual acuity, the worse the testee's visual acuity, and the closer the testee needs to be to the letter to see clearly.
2. Normal range of vision figures
The normal range of vision figures on the visual acuity chart of Guangzhou Zhongshan Eye Hospital is usually 6/6 to 6/60. 6/6 means that a person can see the letters that a normal person can see at a distance of 6 meters, while 6/60 means that a person needs to be 60 meters away from the letters to see the letters that a normal person can see at a distance of 6 meters.
People with vision numbers within the normal range are considered to have normal vision levels. The number of vision below 6/6 may indicate visual problems such as myopia, hyperopia or astigmatism.
3. Significance of visual acuity figures for disease diagnosis
Understanding the vision figures on the vision chart of Guangzhou Zhongshan Eye Hospital can help doctors diagnose and monitor eye diseases. For example, if a person's vision number has significantly decreased in a short time, it may indicate that he is experiencing eye problems, such as vitreous hemorrhage, cataract, retinal detachment, etc.
In addition, vision figures can also be used to evaluate the effect of surgical treatment. By comparing the vision figures before and after the operation, doctors can determine whether the operation is successful and whether the vision is improved.
4. Errors and limitations of visual acuity figures
It should be noted that the vision figures on the vision chart of Guangzhou Zhongshan Eye Hospital are not absolutely accurate, and there are certain errors and limitations. First of all, the visual acuity figures only show the visual acuity level of the testee under the test conditions, and cannot fully reflect the actual visual acuity in daily life.
Secondly, the visual acuity may also be affected by other factors, such as fatigue, anxiety, eye diseases, etc. Therefore, it is not accurate to judge a person's visual health only based on the visual acuity figures. It is also necessary to combine the results of other eye examinations for comprehensive assessment.
Summary
By correctly interpreting the vision figures on the vision chart of Guangzhou Zhongshan Eye Hospital, we can evaluate a person's vision level, help diagnose and monitor eye diseases, and evaluate the surgical treatment effect. However, it is necessary to pay attention to the errors and limitations of visual acuity figures, and visual acuity health cannot be judged only by visual acuity figures. It is better to conduct a comprehensive assessment in combination with the results of other eye examinations to ensure accurate diagnosis and treatment.
