How to get a physical examination for color blindness
Color blindness is a common visual impairment that affects the patient's ability to recognize colors. With the improvement of health awareness, color blindness physical examination has become a topic of concern to many people. This article will introduce in detail the physical examination methods, common types and precautions for color blindness, and attach the hot topic data of the entire Internet in the past 10 days for reference.
1. Types and manifestations of color blindness
There are three main types of color blindness:
| Type | performance | Incidence |
|---|---|---|
| red-green color blindness | Difficulty distinguishing between red and green | About 8% of men and 0.5% of women |
| blue-yellow blindness | Difficulty distinguishing between blue and yellow | relatively rare |
| total color blindness | Can only see black and white | extremely rare |
2. Commonly used methods for physical examination of color blindness
1.Color vision test chart (pseudo same color chart): The most commonly used screening tools, such as the Ishihara Test, test identification ability by hiding numbers or graphics in colored dots.
2.Hue alignment test: The subject is asked to arrange the color blocks in the order of color gradient, such as the Farnsworth-Munsell 100 hue test.
3.Electronic color vision meter: Accurately measure the degree of color vision deficiency by displaying dynamic color changes on the screen.
| Detection method | Applicable scenarios | Accuracy |
|---|---|---|
| Color vision test chart | Routine physical examination, driving license test | about 90% |
| Hue alignment test | Occupational physical examination (e.g. designer) | More than 95% |
| Electronic color vision meter | Professional medical institution | More than 98% |
3. Precautions for physical examination
1.ambient light: It needs to be carried out under natural light or standard lighting to avoid interference from strong light or dark light.
2.Prepare in advance: Avoid looking at electronic screens for a long time before the physical examination to prevent visual fatigue from affecting the results.
3.Children's testing: It is recommended to conduct color blindness screening after 4 years of age. Children with limited expression ability may be misjudged.
4. Related data of popular topics on the entire network in the past 10 days
| Ranking | hot topics | Search volume (10,000) | Related keywords |
|---|---|---|---|
| 1 | College entrance examination color blindness restricted majors | 45.2 | Medicine, Chemistry, Fine Arts |
| 2 | Color blindness correction glasses actual test | 32.7 | EnChroma, Technology |
| 3 | Color blindness standards for civil servant physical examination | 28.9 | police, fireman |
| 4 | Color blindness genetic probability calculation | 18.4 | Genetic testing, marriage and childbirth |
5. Life suggestions for people with color blindness
1.Career options: Avoid occupations that require high color recognition, such as pilots, electricians, etc.
2.Daily assistance: Use color recognition APP or special labels to distinguish items.
3.Regular review: Some acquired color blindness may be caused by eye diseases or drugs and requires annual examination.
Color blindness physical examination is an important way to understand one's own visual function. Through scientific testing and reasonable response, color blind people can live a normal life. If abnormalities are found during physical examination, it is recommended to consult a professional ophthalmologist for further evaluation.
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