Shtopview 19 Inch Optical Instruments Visual Chart Vc-3

An eye chart is a chart used to measure visual acuity. Eye charts are often used by health care professionals, such as physicians or nurses, to screen persons for vision impairment. Ophthalmologists, physicians who specialize in the eye, also use eye charts to monitor the visual acuity of their patients in response to various therapies such as medications or surgery.
The eye test chart  is placed at a standardized distance away from the person whose vision is being tested. 

The person then attempts to identify the symbols on the chart, starting with the larger symbols and continuing with progressively smaller symbols until the person cannot identify the symbols. 

The smallest symbols that can be reliably identified is considered the person's visual acuity.
The Snellen chart is the most widely used. 

Alternative types of eye charts include the log MAR chart, Landolt C, E chart, Lea test, Golovin-Sivtsev table, the Rosenbaum chart, and the Jaeger chart snellen chart.

SHANGHAI TOP VIEW INDUSTRIAL CO.,LTD

&SHTOPVIEW LIMITED

was established in 2008, headquarters lies in Shanghai, China. We are committed to provide ophthalmologists and optometrists with high quality products, high quality technologies and high quality services to applicating the technology of machine vision for medical fields, helping doctors improve health conditions and alleviating the pain of patients. we also specialize in glasses and lens equipments as a brand name distributor.

Our equipments have ISO13485 certification and most of products get CE approved. SHtopview are always keeping innovation on her products and services.

Throughout 11 years in business, we have built ourselves as a value-oriented, service minded, ophthalmic equipment distributor and glasses&lens process equipment with reputation. we become "the Chinese state-of-the-art ophthalmic instrument and your practice" the world 's 180 countrys can see our instruments.

"Details create quality"., SHTOPVIEW is looking for good partners global. for cooperation to exploit new fields, contact us without hesitate! cause there're over 15,000 ophthalmologists and optometrists opticains all over world using our equipments at present.

Warranty

Please kindly tell us which your country's voltage is and plug type before purchase.

After received instrument please keep the "factory serial number" this is important for after service. so far the chinese instrument is too cheap, can not afford over sea Maintenance Center.

For all of our instrument warranty period: 18 months after its delivery to your door.

During this period, the machine appear problems, you can check our website to find the "fixing" we'll ask our tech section cover the problems including (trouble shooting guide, photo, video) if this method can not make sense, it can back to CHINA, declare "no value" "normal items". after it fixed or replaced.we can send to buyer again.

We promise life long service, if the instruments exceed the warranty period, we will also give advice and good service, but it will charge money for extra spare parts.