How to read the vision test sheet
Recently, the topic of eye examinations has become increasingly popular on social media and health forums. In particular, how to correctly interpret the contents of the eye examination form has become the focus of many netizens. This article will combine the popular discussions on the Internet in the past 10 days to provide you with a detailed analysis of how to view the vision test form, and provide structured data to help you understand quickly.
1. Basic structure of vision examination sheet
Eye exams usually include multiple key indicators. Here are explanations of common items:
| Indicator name | Abbreviation | normal range | Description |
|---|---|---|---|
| naked eye vision | UCVA | 1.0 (or 5.0) | Visual acuity without glasses |
| correct vision | BCVA | ≥0.8 (or 4.9) | Best vision with glasses |
| Spherical power | Sph | -0.5D～+0.5D | Degree of myopia (-) or hyperopia (+) |
| Cylinder power | Cyl | ≤0.5D | Astigmatism |
| Axis position | Axis | 0°～180° | Astigmatism direction |
2. How to interpret common terms
1.Visual acuity value expression method: There are two methods commonly used in China: decimal recording (such as 1.0) and five-minute recording (such as 5.0). The corresponding relationship between the two is as follows:
| decimal record | five point record | international standards |
|---|---|---|
| 1.5 | 5.2 | supernormal vision |
| 1.0 | 5.0 | normal vision |
| 0.8 | 4.9 | slight decrease |
| 0.5 | 4.7 | Moderate decline |
2.Refractive error classification: The type of vision problem can be determined based on the checklist data:
| Type | Spherical lens (Sph) characteristics | Cylinder (Cyl) characteristics |
|---|---|---|
| Myopia | Negative value (such as -2.50D) | May be accompanied by astigmatism |
| Farsightedness | Positive value (such as +1.75D) | May be accompanied by astigmatism |
| astigmatism | close to 0 | Absolute value≥0.75D |
3. The meaning of special symbols
The following special markings may appear on the checklist:
| symbol | meaning | Handling suggestions |
|---|---|---|
| ※ | Items to be reviewed | Review within 1 month |
| ↑↓ | Large numerical fluctuations | Pay attention to eye habits |
| PD | Interpupillary distance (mm) | Important parameters of glasses |
4. Reference standards for different age groups
Vision development has age characteristics, and the normal range of vision at each age is as follows:
| age group | normal vision | Things to note |
|---|---|---|
| 3-5 years old | 0.5-0.8 | Hyperopia reserve should be ≥+1.50D |
| 6-12 years old | 0.8-1.0 | Pay attention to the development of myopia |
| adult | ≥1.0 | Be wary of visual fatigue |
| Over 45 years old | Corrected visual acuity ≥0.6 | Pay attention to presbyopia issues |
5. Answers to recent popular questions
Based on the hot topics on the Internet in the past 10 days, the following high-frequency questions have been sorted out:
1.Why does the corrected visual acuity fail to reach 1.0?
Possible reasons include: amblyopia, fundus lesions, inaccurate refraction or lens adaptation problems. It is recommended to undergo medical optometry and fundus examination.
2.What should I do if there is a huge difference between the computer prescription and the doctor’s handwritten prescription?
Computer refraction is for reference only. The final result should be based on the optometrist’s subjective refraction. If the difference exceeds 0.75D, a new refraction is required.
3.What does the change in astigmatism axis mean?
An axial change of ≥10° may indicate changes in corneal morphology, and diseases such as keratoconus need to be investigated.
4.Do children with vision 4.9 need glasses?
Comprehensive judgment needs to be combined with diopter, eye position and visual function. A simple visual acuity of 4.9 may be a normal fluctuation.
6. Expert advice
1. Save previous inspection orders to create visual acuity files and compare changing trends.
2. If you find that your visual acuity has dropped by more than two lines (such as 1.0 → 0.6), you should seek medical attention promptly.
3. Teenagers should be reviewed every 3-6 months, and adults should be reviewed at least once a year.
4. The prescription for glasses must include four basic parameters: spherical lens, cylinder lens, axial position, and interpupillary distance.
By systematically understanding how to interpret vision test sheets, you can more accurately grasp your eye health. When abnormal data is found, it is recommended to promptly consult a professional ophthalmologist for detailed examination.
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