Yes, what your friend says is right. Some people are born to be color blinded because of the genetic genes. Once you get color blind problems, you will not see the fll colors. However, there is the difference for the color blindness. Some people just see several colors. And others could just see the white and black colors. However the color-blind correction lens is a special coating on the lens. Its main working mechanism is to lengthen the wave transmittance and elder in shortwave elders reflection in general. The effect of color blindness glasses is only suitable for patients with red and green problems. After wearing this kind of glasses, you can see the shape of a figure, feeling differences between red and green, which is able to improve the ability of color discrimination. If you belong to this kind of problems, you could have a try to make you see things clearly.
