Eye chart of eye hospital
Visual acuity chart, also known as optometer, is a common tool used by eye hospitals to test patients' vision. It consists of a series of letters, numbers and symbols arranged in different sizes and spaces. Patients need to judge their vision level by looking at the characters on the vision chart. Eye charts in eye hospitals usually include the following:
1. E visual chart: E visual chart is one of the most common visual charts. Only the letter E appears on the visual acuity chart, but it appears in different directions and sizes. During the test, the doctor will point to E in different directions, and the patient needs to point out their directions (up, down, left, right). This visual acuity chart is suitable for people of most ages.
2. Snellen vision chart: Snellen vision chart is a vision measurement standard invented by Hermann Snellen, a Dutch ophthalmologist, in 1862. It consists of lines of letters and numbers. The size of letters and numbers decreases with the increase of the number of lines. The patient needs to stand within a certain distance and read the characters on the visual acuity chart line by line. By recording the number of lines that read the smallest letter line, doctors can judge the patient's vision level.
3. Landolt C vision chart: Landolt C vision chart is a vision test tool invented by Swiss doctor Edmund Landolt in 1888. There is only one character on the visual acuity chart, that is, the pattern of letter C in different directions. The patient needs to judge the disconnection direction of letter C and point out whether the disconnection direction is up, down, left or right. This visual acuity chart is mainly used to detect children and illiterate patients.
4. Kay Picture visual chart: Kay Picture visual chart is mainly used to test children's vision. It consists of a series of pictures, such as animals, fruits, vehicles, etc. Patients need to identify and name the pictures on the vision chart to determine their vision level. Kay Picture visual acuity chart uses images instead of words, which is more suitable for younger or illiterate people.
Vision chart of Shanghai Heping Ophthalmology Department
Shanghai Heping Ophthalmology Department is a well-known ophthalmic hospital located in Shanghai. The vision test tools of this hospital are roughly the same as those of other ophthalmic hospitals, usually using E visual acuity chart, Snellen visual acuity chart, Landolt C visual acuity chart, Kay Picture visual acuity chart, etc.
The E visual acuity chart of Shanghai Heping Ophthalmology Department is basically the same as the standard E visual acuity chart used by general ophthalmic hospitals. Letters E with different directions and sizes are arranged on the visual acuity chart, and patients need to judge their directions. This is one of the most commonly used testing tools.
Snellen eye chart is also widely used in Shanghai Heping Ophthalmology Department. This visual acuity chart is composed of multiple lines of letters and numbers. By reading the number of lines of the smallest letter line, doctors can accurately assess the vision of patients. This vision test method is mature and widely recognized.
Landolt C visual acuity chart also exists in Shanghai Heping Ophthalmology Department. The patient needs to judge the disconnection direction of the letter C and point out whether they are up, down, left or right. This is a feasible vision test method for children and illiterate patients.
Shanghai Heping Ophthalmology Department also uses Kay Picture visual acuity chart to test children's vision. This visual acuity chart allows children to identify and name different pictures by showing them. Compared with words, children are easier to understand and respond to pictures, so this vision test method is more suitable for them.
Summary
The visual acuity chart of eye hospital is an important tool for testing patients' vision. Common visual acuity charts include E visual acuity chart, Snellen visual acuity chart, Landolt C visual acuity chart and Kay Picture visual acuity chart. As a well-known ophthalmic hospital, Shanghai Heping Ophthalmology Department also uses these common vision testing tools. Shanghai Heping Ophthalmology Department can provide accurate vision testing services whether it is a general E visual acuity chart or a Landolt C visual acuity chart that requires patients to judge the character direction. At the same time, for children, Shanghai Heping Ophthalmology Department also used Kay Picture visual acuity chart suitable for their age to test. In general, the vision chart of Shanghai Heping Ophthalmology Department has a high similarity with other ophthalmic hospitals, providing accurate and personalized vision testing for patients.
