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Product Description
The E Eye Chart Visual Acuity Chart with Astigmatism Dial is a standard tool used to assess visual acuity. The size of each optotype is meticulously designed following the one-minute visual angle principle, guaranteeing precise measurements for accurate vision testing. This product ships from the United States.
- Material and Durability: Crafted from thick and robust PVC material, this visual acuity chart ensures durability and waterproof capabilities. Its matte finish eliminates glare and reflections, providing an optimal testing environment for accurate results.
- Accurate Size and Design: Each letter is meticulously sized according to the one-minute visual angle principle, ensuring precise measurements. The chart features the letter "E" in various orientations (up, down, left, and right), making it suitable for testing individuals unfamiliar with different alphabet letters or those who have difficulty reading. Additionally, red and green color bars aid in assessing red-green color blindness.
- Convenient Testing Tools: Aside from identifying the direction of the "E" on the chart, you can also assess for astigmatism by comparing line thicknesses on the astigmatism test chart. The chart is rolled up for packaging, and we recommend using double-sided adhesive for easy wall mounting.
- Practical Mounting Recommendations: Place the chart away from direct sunlight or dimly lit areas, ensuring it is flat and vertical when mounted. For adults, the "20/20" line should typically be at eye level, but adjustments may be necessary for children. During testing, the subject stands 20 feet away from the chart.
- Versatile Applications: This eye chart is highly versatile and suitable for various settings, including educational institutions, eye clinics, hospitals, and other medical facilities requiring vision testing.
Product Details
PVC Material: Constructed from strengthened PVC material, it boasts high durability and tear resistance. The surface of the vision chart stays remarkably clear, devoid of any glare or reflection.
Waterproof Functionality: The vision chart is designed with waterproof features, enhancing its durability and reliability in various environments.
Secure Affixing with Double-Sided Tape: To ensure stability and prevent curling, utilize double-sided tape to firmly fix the four corners of the chart during mounting.
Simple Setup, Effortless Testing: Simply fix the eye chart with double-sided tape at all four corners, and then use a pointer and an eye patch to measure the vision for each eye separately.
FAQ
Are You Ready for Your Vision Test?
1. Choose a quiet, well-lit area with no obstructions in front of the eye chart.
2. Attach the chart to the wall using double-sided tapes, making sure that the 20/20 line is at eye level.
3. The standard testing distance is 20 feet (6 meters).
What Are the Steps Involved in Vision Testing?
1. Stand 20 feet away from the chart.
2. Cover the left eye first, then the right eye separately.
3. Begin reading from the top of the chart, moving downward.
4. Record the clearest line that can be seen for each eye separately.
Who Can Use This Vision Chart for Testing?
This chart is suitable for individuals who are 5 years of age and older to assess visual acuity. For children under 5 years old, their eyes are still in development, and they may only be able to read up to the 20/40 or 20/50 lines.
What Do the Results Indicate on This Chart?
If you can read the letters on every line from 20/20 and upwards, your prescription is 0D, indicating good vision. If you can only read from 20/40 and upwards, your prescription may be -1.00D, suggesting a need for correction. However, these results may not be precise, and it's recommended to visit a professional optometrist for a prescription.
Can You Determine Red-Green Color Blindness and Astigmatism?
1. If you observe the astigmatic dial on the chart and the thickness of the lines varies, it indicates the presence of astigmatism.
2. The inclusion of red and green color bars facilitates the assessment of red-green color blindness.
Warning: The four corners of the vision chart have sharp edges, please be cautious to avoid any potential cuts or injuries.
All Options
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| MODEL | JFVAC00001 | JFVAC00002 | JFVAC00003 | JFVAC00005 | JFVAC00006 | JFVAC00007 |
| Standard Testing Distance | 20 feet | 20 feet | 20 feet | 20 feet | 10 feet | 10 feet |
| Waterproof | √ | √ | √ | √ | √ | √ |
| Eye Occluder for Vision Test | √ | √ | X | X | X | X |
| Pointer for Vision Test | √ | √ | X | X | X | X |
| Double-Sided Tapes | √ | √ | √ | √ | √ | √ |