The symptoms of color blindness can range from mild to severe. Many people have such mild symptoms that they are unaware that they have a color deficiency. Parents may only notice a problem with a child when he is learning his colors. Symptoms include:

• Trouble seeing colors and the brightness of colors in the usual way;
• Inability to tell the difference between shades of the same or similar colors. This happens most with red and green, or blue and yellow.

There is no treatment for congenital color blindness. It usually does not cause any significant disability. However, there are special contact lenses and glasses that may help.

Your ophthalmologist can treat acquired forms of color blindness. He or she will address the underlying condition or drug that caused the problem.