Designed as a simple screen test. The usual question for a reading test is: "What is the smallest (black) line you can read?" On the contrast card one adds the question "What is the smallest (grey) line you can read?" The difference between the two measurements will be obvious and can simply be expressed in "lines". Preliminary findings indicate a 2 or 3 line difference is normal.
Mixed high-contrast and 10% contrast
Unrelated simple sentences at 4th grade level
Serves as an educational tool to demonstrate the effect of contrast deficits to patients and family members.
Multi-distance testing
Acuity range 10m to 0.6m in Times Roman Font (20/320, 6/95 to 20/16, 6/4.8 equiv.)
Includes test instructions and diopter ruler
Measures 43 x 38 cm (17 x 11 in.)
Folds in half to 21.5 x 38 cm (8.5 x 11 in.)
Also available in various languages:
Part # 4061 - English
Part # 4062 - Spanish
Part # 4064 - German
Part # 4065 - Dutch
Part # 4066 - Finnish
Part # 4067 - Swedish
Part # 4068 - Italian
Part # 4069 - French
For additional information, visit: http://www.ski.org/Colenbrander
IS
