Factory lcd display eye examination visual acuity chart eye vision test chart
Fvasee Technology Co.,Limited established in 2011, is national high and new technology enterprise specialized in development, production and marketing of the professional special larger digital touch displays in virtually any size below 120 inches. As one of the leading providers of special display solutions, Fvasee always stands on the forefront of the special displays development. The products are divided into several series:Education All In One PC,Conference All In One PC,Business Touch screen interactive whiteboards, indoor/outdoor LCD advertising displays, LCD video walls, touch interactive kiosks and so on. Fvasee’s products have been widely used in a variety of areas such as security monitoring, stock exchanges, traffic control centers, airports, media centers, military systems, public space, shopping areas, banks, schools, hospitals, special circumstances etc. providing cost-effective products and customer-oriented services. Fvasee has become the ODM / OEM partners of a number of world-class companies. Konka trusts our factory and work with us almost 12 years now. And we have been exported to South Korea, Canada, United States, Australia, Italy, Southeast Asia, the Middle East and other regions. We 100% conduct strict well-rounded quality assurance and quality control system. Our quality manager has more than 10 years’ experience. From the raw materials to pre-production to final packaging, our six in-house QC and four QA personnel monitor each process closely. Profiting from our factory’s advanced machinery, raw materials 97% sourcing from first-line supplier, good quality control facilities and professional 13 engineers and QC team. Fvasee has been awarded the ISO9001,ISO14001 quality management system certificate, and the products series are certified to CCC,CE, FCC, RoHS and UL certificates. Kindly welcome to contact us and our experienced sales staffs will answer your inquiries in time.
Factory lcd display eye examination visual acuity chart eye vision test chart
⚙️ Specifications
item |
eye vision test char |
Warranty |
3 years |
Customized support |
OEM, ODM, OBM |
Place of Origin |
GUA |
Brand Name |
FVASEE |
Model Number |
|
Power supply |
AC100V to240V,50/60Hz |
Standard power |
Approx. 25W |
Size of monitor |
19''//21.5'' |
Type of monito |
TFT |
Ratio of monitor |
4:3//16:10//16:9 |
DPI of monitor |
1280*1024/60Hz //1440X900/60Hz,// 1920X1080/60Hz |
Visual size |
376X301mm |
Measuring distance |
2M to 6.5M |
Recording methods of vision |
Decimal & Imperial fraction |
Control distance |
not less than 8M for maximum |
🤝 Supports
Definition
The visual acuity test is used to determine the smallest letters you can read on a standardized chart (Snellen chart) or a card held 20 feet (6 meters) away. Special charts are used when testing at distances shorter than 20 feet (6 meters). Some Snellen charts are actually video monitors showing letters or images.
Alternative Names
Eye test - acuity; Vision test - acuity; Snellen test
How the Test is Performed
This test may be done in a health care provider's office, a school, workplace, or elsewhere.
You will be asked to remove your glasses or contact lenses and stand or sit 20 feet (6 meters) from the eye chart. You will keep both eyes open.
You will be asked to cover one eye with the palm of your hand, a piece of paper, or a small paddle while you read out loud the smallest line of letters you can see on the chart. Numbers, lines, or pictures are used for people who cannot read, especially children.
If you are not sure of the letter, you may guess. This test is done on each eye, and one at a time. If needed, it is repeated while you wear your glasses or contacts. You may also be asked to read letters or numbers from a card held 14 inches (36 centimeters) from your face. This will test your near vision.
How to Prepare for the Test
No special preparation is necessary for this test.
How the Test will Feel
There is no discomfort.
Why the Test is Performed
The visual acuity test is a routine part of an eye examination or general physical examination, particularly if there is a change in vision or a problem with vision.
In children, the test is performed to screen for vision problems. Vision problems in young children can often be corrected or improved. Undetected or untreated problems may lead to permanent vision damage.
There are other ways to check vision in very young children, or in people who do not know their letters or numbers.
Normal Results
Visual acuity is expressed as a fraction.
- The top number refers to the distance you stand from the chart. This is often 20 feet (6 meters).
- The bottom number indicates the distance at which a person with normal eyesight could read the same line you correctly read.
For example, 20/20 is considered normal. 20/40 indicates that the line you correctly read at 20 feet (6 meters) away can be read by a person with normal vision from 40 feet (12 meters) away. Outside of the United States, the visual acuity is expressed as a decimal number. For example, 20/20 is 1.0, 20/40 is 0.5, 20/80 is 0.25, 20/100 is 0.2, and so on.
Even if you miss one or two letters on the smallest line you can read, you are still considered to have vision equal to that line.
What Abnormal Results Mean
Abnormal results may be a sign that you need glasses or contacts. Or it may mean that you have an eye condition that needs further evaluation by a provider.
Risks
There are no risks with this test.