To evaluate yournear vision, your eye doctor may use a small hand-held card called aJaeger eye chart. The Jaeger chart consists of short blocks of text in various type sizes. A Jaeger eye chart contains several blocks of gradually larger text and is used to test near vision. A Jaeger ey...
The method of the present invention comprises a vision test value related records to correctly identify a person by the eye chart on at least two letters, numbers, and graphics objects, and to compare the value of each eye patients. 由于这些符号是不同的,视敏度的记录值是准确的,并与每一次...
The most common way to do this is using what's called a Snellen chart. The chart has larger letters or symbols at the top, and they get smaller as you move down the rows. When you think of having your eyes checked, the eye chart test may be the first thing that comes to mind. W...
The Snellen chart is an eye chart that measures a person’s vision by how well they can read and see detail. Dr. Herman Snellen, a Dutch eye doctor, created the eye chart in 1862 for his colleague, Dr. Franciscus Donders. Dr. Donders conducted eye exams by having people look at a c...
SC-800 LCD Vision Chart liquid crystal Eye Vision Chart Visual Acuity Chart, You can get more details about SC-800 LCD Vision Chart liquid crystal Eye Vision Chart Visual Acuity Chart from mobile site on Alibaba.com
vision when moved along this meridian. (A meridian is a curve on the surface of a sphere that is formed by the intersection of the sphere surface and a plane passing through the centre of the sphere.) The field is recorded on a chart. On the nasal side, the field is restricted to ...
Pocket Size Visual Acuity Eye Vision Test Chart Snellen Eye Chart, You can get more details about Pocket Size Visual Acuity Eye Vision Test Chart Snellen Eye Chart from mobile site on Alibaba.com
Illustration about Eye test chart. Poster for vision exam. Eye care test placard with latin letters. Vector. Illustration of myopia, exam, chart - 211947913
Vision Screening for Children Vision screening is essential for your child's eye health. Some eye problems make children rub their eyes or squint, but others have no symptoms. Vision screening will detect many of these eye problems. Vision screening using an eye chart should be done as soon ...
Best Quality Optical LED 3m, 5m Visual Acuity Eye Vision Test Chart Feature of visual chart : Durable, Environmentally-Friendly and Energy Saving Slim but Delicate with Uniform Luminance Durable, High-definition and Ultra-bright Protect Your Eyes Adopting extra thi...