How to use the visual acuity chart provided by Guangzhou Zhongshan Eye Hospital to test vision
Vision is one of our important perception abilities, which can reflect the eye's ability to receive and process external information. Guangzhou Sun Yat sen Eye Hospital provides a simple and effective vision test method, which can accurately determine and quantitatively evaluate the vision level of patients through the vision chart. The following details how to use the visual acuity chart provided by Guangzhou Zhongshan Eye Hospital for vision testing from four aspects: installation of the visual acuity chart, test steps, interpretation of results, and test application.
Install the eye chart
Before the vision test, it is necessary to correctly install the vision chart. Guangzhou Zhongshan Eye Hospital will install the visual acuity chart in an appropriate position to ensure that patients can clearly see the characters on the visual acuity chart when standing or sitting. The visual acuity chart is usually placed about 4-6 meters away from the patient to ensure that the patient can clearly recognize characters of different sizes.
In addition, it is also necessary to ensure that the eye chart is not interfered by external light, and avoid direct sunlight or strong light from shining on the eye chart. During the installation of the eye chart, the hospital staff will adjust the light and angle to ensure a good test environment.
testing procedure
The vision test is generally divided into two types: far vision test and near vision test. Far vision test is to evaluate the vision level of patients at a distance through the characters on the vision chart, while near vision test is to evaluate the vision level of patients at a close distance.
For the far vision test, the patient needs to stand at the specified position and answer the questions of the doctor or staff by observing the characters on the vision chart. They will determine the patient's vision level based on the patient's answers. For the near vision test, the patient needs to sit in the specified position, observe the characters on the vision chart one by one and answer the questions.
During the test, patients need to focus and concentrate to ensure accurate answers to questions. At the same time, the patient should also inform the doctor or staff whether there is any situation that they cannot see clearly or recognize incorrectly, so that they can make corresponding adjustments.
Result interpretation and test application
After the vision test is completed, the hospital staff will draw a numerical index related to vision, usually in the form of 20/20, 20/40, etc., according to the patient's answers and test results. This value represents the size and clarity of the characters seen by the patient relative to those seen by normal people.
Through the results of the vision test, the hospital can evaluate the patient's vision level and further judge whether there is a vision problem. Based on the test results, doctors can develop personalized treatment plans for patients, such as glasses, surgery or medication. In addition, vision test can also be used to monitor the progress of disease and evaluate the effect of treatment, providing important reference for doctors.
Summary
The vision chart provided by Guangzhou Zhongshan Eye Hospital is a fast and accurate vision test tool. By correctly installing the visual acuity chart, following the test steps and accurately interpreting the results, we can use the visual acuity chart to assess the vision level of patients and provide them with appropriate treatment and intervention measures. Vision test plays an important role in the prevention, diagnosis and treatment of eye diseases. Everyone should receive vision test regularly to protect their vision health.
