Congenital color blindness or color deficiency in children can be detected at around 3 to 5 years of age.
The exact age at which a child can be screened for congenital color blindness or color deficiency depends on how old the child is when he or she learns to recognize or distinguish colors. Generally, between the ages of 3 and 5 years old, a normal child can be screened for color blindness or color deficiency.
At this time, children with color blindness or color deficiency will show more or less abnormalities during screening, and color deficiency is generally more complicated to determine than color blindness.
Color weakness is a lower sensitivity to color discrimination rather than an error. When screened for color blindness or color weakness, the ability to discriminate between multiple colors will be dulled, and it will be difficult to see the visual markers when the colors are faint or the light is low.
It is recommended to go to the ophthalmology department for timely or regular screening of visual acuity and color vision to detect any congenital or acquired problems and to address them or draw attention to them in a timely manner.