1. Maintain sight distance
When using a liquid crystal vision chart, it is necessary to maintain a good visual distance, that is, the distance from the screen must meet the requirements to avoid affecting the vision test results. Different LCD vision charts have different optimal viewing distances, which should be selected based on specific circumstances, usually between 40cm and 60cm.
2. Adjust brightness
When using an LCD vision chart, it is necessary to adjust the screen brightness according to the environmental brightness and personal habits, and adjust it to a suitable brightness to ensure the accuracy of the test, while also reducing eye fatigue.
3. Maintain flexibility
When using an LCD vision chart, it is important to maintain a natural posture of the body and not bend the neck or body to avoid causing neck muscle fatigue. At the same time, attention should be paid to adjusting the focal length of the eyes to maintain comfort and accuracy during the vision testing process.
4. Pay attention to time
When conducting continuous eye tests, it is important to rest regularly to avoid eye fatigue and damage caused by excessive eye use. It is recommended that the duration of each test should not exceed 20 minutes, and the eyes should rest appropriately at regular intervals.
5. Keep clean
The LCD vision chart should be kept clean to avoid dust, fingerprints, and other debris from affecting the test results. Develop good maintenance habits and regularly clean and maintain the screen.
6. Correct understanding
To have a correct understanding of the significance of the LCD vision chart test results, do not use it as the only standard for diagnosing eye problems such as myopia, nor can it be used for self diagnosis and treatment. If you have vision problems, you should promptly consult a professional doctor.