Shanghai Medical Corporation is professional supplier and manufacturer of snellen eye chart.
A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen, who developed the chart in 1862. Many ophthalmologists and vision scientists now use an improved chart known as the LogMAR chart. SMC eye chart could either be home use or for shops. It will help you determine the clarity of your distance vision. This can be useful to screen children for nearsightedness, which causes blurry distance vision. The chart also can help you determine if you meet the legal visual acuity requirement for a valid driver’s license (20/40 in most states)
There are 5 letters on each line, thereby reducing any effect from crowding and allows easier calculation of a visual acuity score. To measure your visual acuity accurately, certain conditions have to be fulfilled and standardized: contrast, illumination and distance.
For the best accuracy (and to prevent memorization), have someone assist you when testing your vision with this eye chart. If you use eyeglasses or contact lenses for driving or other distance vision tasks, wear them during the test.
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