Portable eye exercises wall chart (latest edition)(Chinese Edition) - Softcover

Xu Guo Xing

Softcover

ISBN 10: 7533539192 ISBN 13: 9787533539191

Publisher: Fujian Science and Technology Pub. Date :2011-09-01 version 1, 2000

Synopsis

Paperback. Pub Date :2011-9-1 Fujian Science and Technology Press 1. This table GB11533-89 produced in accordance with national standards People's Republic of China. Check the distance of 30 cm. the left side of sight reading is reading; inspection distance of 50 cm. the sight reading is to the right reading. 2. Checks can be filled with natural light or artificial light illumination. the light should be sufficient vision statement should avoid direct sunlight. Eyes should be checked separately when checking one. the other eye covered with an opaque material. not added pressure. 3. Check the table on the front of the eye 30 cm or 50 cm. see the corresponding record 5.0 or 5 points from the corresponding record 1.0 line as the standard decimal visual acuity was 5.0 (5 points record) or a .0 (decimal record). I analogy. Measure the eye can identify the subject line ...

Edition details

• Publisher: Fujian Science and Technology Pub. Date :2011-09-01 version 1
• Publication date: 2000
• Language: Chinese
• ISBN 10: 7533539192
• ISBN 13: 9787533539191
• Binding: Paperback