How to Use Guangzhou Ophthalmic Eye Chart Correctly
Guangzhou Eye Chart is a common ophthalmic diagnostic tool, which is used to evaluate people's vision. The correct use of the Guangzhou Ophthalmology Eye Chart is very important for the correct judgment of eye health. The following will introduce how to use the Guangzhou Eye Vision Chart correctly from different aspects.
preparation
Before using the Guangzhou Ophthalmic Eye Chart, you need to prepare the relevant equipment and environment. Ensure the clarity and brightness of the eye chart, and adjust the light intensity in the control box as needed. At the same time, ensure that the tested person's eyes are fully rested, and avoid testing when they just wake up or are excessively tired.
In addition, a quiet environment should be selected to reduce external interference. Ensure that the subject sits up straight, maintains a comfortable posture, and ensures that there is sufficient light in the front.
After the preparations are completed, you can start to use the Guangzhou Ophthalmology Eye Chart for testing.
Operation steps
Step 1: Make the icon of the visual acuity chart clearly visible, and ensure that the testee stands or sits at the correct distance. Generally speaking, the distance should be 6 meters, but it needs to be adjusted according to the specific situation.
Step 2: Before the test starts, it is necessary to explain the purpose and steps of the test, so that the testee can understand the test process. Tell the subjects that they need to focus on a point on the visual acuity chart and remind them to concentrate.
Step 3: Start from the first line of the visual acuity chart and test line by line down. At the end of each line, such as "10/10", record the smallest line that can be clearly seen by the testee. If the tested person cannot see a line clearly, he can change his eyes to test until he finds the smallest line he can see.
Step 4: Repeat the test to ensure the accuracy of the results. Rest properly during the test to avoid excessive fatigue or dry eyes.
matters needing attention
When using the Guangzhou Ophthalmic Eye Chart, the following points should also be noted:
1. The reading distance should be correct. Too far or too close may affect the accuracy of the test results.
2. Avoid the interference of colored glasses. Colored glasses may change the testee's perception of icons.
3. Follow the test sequence. Test from top to bottom to ensure the accuracy of the results.
4. Follow the operation specifications. The operator should be familiar with the method of using Guangzhou Ophthalmic Eye Chart and strictly follow the prescribed steps.
To sum up, the correct use of the Guangzhou Ophthalmic Eye Chart requires some preparation, testing according to the correct operating procedures, and paying attention to the relevant precautions. Only when the test is carried out under the correct conditions, can accurate vision assessment results be obtained, so as to better judge the health of the eyes.
Summary
Through the introduction of this article, we know how to correctly use the Guangzhou Eye Vision Chart. The preparation, operation steps and precautions are all important factors to ensure the accuracy of the test. During the test, we need to ensure that the equipment and environment are in good condition, guide the tested correctly, follow the operating specifications, and pay attention to the details of the test. Only in this way can we get accurate vision assessment results and provide accurate reference for eye health.
