How to evaluate eye health according to the vision chart of Guangzhou Zhongshan Eye Hospital?
Guangzhou Zhongshan Eye Hospital is a professional ophthalmic medical institution, providing a variety of ophthalmic services and examinations. Vision examination is one of the important indexes to evaluate the health of eyes. This article will elaborate on how to assess eye health according to the vision chart of Guangzhou Zhongshan Eye Hospital from four aspects: the use of the vision chart, interpretation of vision measurement, common eye health problems, and diagnosis and treatment suggestions.
1、 Usage of visual acuity chart
Vision chart is a tool used to measure the distance vision of patients, among which Snellen vision chart is commonly used. When using the visual acuity chart, the patient needs to keep the distance of vision measurement, which is usually 6 meters. The doctor will show the patient how to follow the correct test steps, then read the letters on the vision chart one by one, and ask the patient to be able to clearly recognize and report the letters they see.
The test results are generally expressed in fractions, such as 6/6 or 20/20. The numerator of the number indicates the distance (in meters) from the position where the testee stands to the visual acuity chart, while the denominator indicates the distance that the same character can be clearly recognized under normal vision. For example, a score of 6/6 means that the testee stands at a distance of 6 meters from the visual acuity chart and can recognize a character that can be seen at 6 meters by people with normal vision.
Generally speaking, the letters on the visual acuity chart gradually become smaller from top to bottom, and the difficulty of identification also gradually increases. By testing whether the patient can recognize the letters on the vision chart at different distances, the doctor can preliminarily assess the patient's vision health.
2、 Interpreting vision measurements
After the visual acuity chart test, the doctor will evaluate the patient's visual health according to the measured visual acuity measurements. Generally speaking, the greater the vision measurement value, the better the vision. For example, 6/6 indicates normal vision, while 6/12 indicates that the patient can recognize a character that normal vision can see at 12 meters at 6 meters.
A decrease in vision measurements may indicate a problem with the patient's vision. Doctors can judge whether the patient has myopia, hyperopia, astigmatism and other vision problems according to the measurement results. If the vision measurement is abnormal, the doctor may recommend further examination to determine the exact vision problem.
3、 Common eye health problems
Poor vision is one of the common eye health problems, including myopia, hyperopia and astigmatism. Myopia means that the patient can clearly see the near objects while the distant objects become blurred. In contrast to hyperopia, patients can clearly see distant objects, but near objects become blurred. Astigmatism is a vision problem caused by the irregular shape of the eyeball.
Eye health problems may affect vision measurements, for example, myopia may have lower scores on vision tests at a distance. Therefore, doctors can assess patients' eye health more accurately by comprehensively considering their vision measurements and symptoms.
4、 Diagnosis and treatment suggestions
According to the test results of the visual acuity chart and other auxiliary examinations, doctors can give corresponding diagnosis and treatment suggestions. If the vision measurement value is normal and the patient's eyes are in good health, it may only be necessary to check the vision regularly. If the vision measurement value is abnormal, the doctor may suggest further examination of fundus, intraocular pressure and other indicators to diagnose the patient's eye health problems and develop a corresponding treatment plan.
According to the diagnosis and treatment suggestions, patients can take corresponding treatment measures, such as wearing glasses or contact lenses, performing vision correction surgery, etc., to improve vision problems. At the same time, the doctor will also provide advice on eye health protection, such as maintaining good eye habits, avoiding long-term eye use, and checking eyes regularly.
Summary
Through the visual acuity chart provided by Guangzhou Zhongshan Eye Hospital, we can make a preliminary assessment of the patient's eye health. The results of the visual acuity chart can help doctors determine whether patients have vision problems and give corresponding diagnosis and treatment suggestions. Everyone can also keep a good habit of using eyes in their daily life, and regularly check their eyesight to maintain eye health.
