How to test the degree of myopia according to the vision chart of Guangzhou Zhongshan Eye Hospital?
Vision is one of the important ways for human beings to perceive the outside world, and myopia has become a common problem of modern human eye health. Myopia is mainly caused by the fact that the eyeball is too long or the eye axis is too large, which causes the light to focus in front of the retina, making distant objects blurred. In order to help patients accurately understand their vision, Guangzhou Zhongshan Eye Hospital has developed a special visual acuity chart test method. The following will elaborate on the selection of visual acuity chart, test steps, judgment of myopia degree and suggested treatment.
Select the appropriate visual chart
In order to accurately test the degree of myopia, Guangzhou Zhongshan Eye Hospital chose a scientifically calibrated visual acuity chart. This visual acuity chart uses the standard Sloan alphabet and is displayed at a distance of one meter. Before the test, the medical staff will adjust the light to ensure that the test environment is suitable for the patient's observation.
The visual acuity chart is generally arranged from large characters to small characters, and the font size of each line is gradually reduced. According to the patient's reaction, the doctor can preliminarily judge the vision condition and select the corresponding test details.
testing procedure
The ophthalmologist will test the far vision or near vision according to the patient's requirements or symptoms. Generally speaking, it is necessary to ensure that the patient's eyes are in a normal working state during the test to ensure that the test results are accurate and reliable.
During the test, the doctor will instruct the patient to hold his breath and look at specific letters or figures on the vision chart. The patient needs to observe attentively and tell the doctor the specific content of the letter or figure. The doctor judges the patient's vision level according to the smallest font size that the patient can accurately recognize.
Determination of myopia degree
According to the test results, Guangzhou Sun Yat sen Eye Hospital divided myopia into different levels, such as low myopia, moderate myopia and high myopia. Generally speaking, those with a degree between - 1.0 and - 3.0 belong to low myopia, those with a degree between - 3.0 and - 6.0 belong to moderate myopia, and those with a degree greater than - 6.0 belong to high myopia.
The doctor will explain the meaning of the degree of myopia to the patient and provide further suggestions for treatment.
Recommended treatment
According to the different degrees of myopia, Guangzhou Zhongshan Eye Hospital will provide personalized treatment suggestions for patients. For patients with low myopia, doctors may recommend regular ophthalmic reexamination and give correct eye guidance, such as controlling the time and distance of eye use. For patients with moderate and high myopia, doctors may recommend wearing myopia glasses or contact lenses to correct their vision, and perform fundus examinations regularly.
In addition, Guangzhou Zhongshan Eye Hospital will also popularize the knowledge of myopia prevention for patients, such as maintaining a good eye environment and scientific eye use. Through various means, they help patients understand and improve myopia, improve the quality of vision, and improve the quality of life.
To sum up, the vision chart test method of Guangzhou Zhongshan Eye Hospital can help patients understand and manage their vision problems by selecting appropriate vision charts, carrying out standardized test procedures, accurately determining the degree of myopia, and providing personalized treatment suggestions. Patients can take active treatment and prevention according to the doctor's suggestions to protect eye health.
