Introduction
Color blindness is a condition in which someone is unable to distinguish certain colors. This condition affects approximately 8% of men and 0.5% of women worldwide, making it difficult for individuals to see traffic lights, maps, or other visual cues; it could even make learning and working in certain professions more challenging. Therefore, early identification of color blindness in children through a color blind test is highly recommended.
What is a Color Blind Test?
A color blind test is an invaluable screening tool that can identify people with color vision deficiency. These tests typically consist of images or patterns with dots of various hues and sizes; those with normal vision should be able to spot numbers or shapes within these patterns; those suffering from color blindness may see something entirely different – or nothing at all!
The Ishihara Test
The Ishihara Test is the most widely used color blindness test. Invented by Dr. Shinobu Ishihara in 1917, this 38 plate device contains a pattern of colored dots arranged a specific way that people with normal vision can discern; however, those suffering from color blindness may see another number or shape within that pattern, or nothing at all.
The Ishihara Test for Kids
The Ishihara Test can be challenging for young children, as they may not understand the concept of numbers or shapes. Therefore, modified versions of the Ishihara Test exist specifically designed for kids that use images of animals or cartoon characters instead of numerical values or shapes.
How to Administer the Test
For kids, administering the Ishihara Test for Kids should take place in a brightly-lit room with ample time for reflection and answering questions. Sit the child at a comfortable distance from the screen or chart, cover one eye with their hand or an eye patch, and point out each plate while asking them what it is. Be sure that each plate receives enough light so that everyone has time to look carefully and answer accurately.
Interpreting the Results
If a child correctly identifies all plates, they likely possess normal color vision. On the other hand, if one or more are missed, there could be an underlying color vision deficiency. The severity of color blindness depends on both how many and what kind of plates were missed.
Color Blind Test for Kids
Conclusion
Color blindness can have a major effect on a child’s learning and development, making early identification of this deficiency essential. The Ishihara Test is an effective screening tool that can detect color vision deficiency in children; modified versions have been created specifically for younger kids to make the test more accessible. If you believe your child may have color vision deficiency, speak to either your pediatrician or eye care professional about scheduling a color blind tesla screening appointment.
