Color Vision Deficiency and Stereovision

August 14, 2013

Color Vision Deficiency

Color vision is the ability to distinguish objects based on the wavelengths of light that are reflected, emitted, or transmitted. Human color perception is a brain response to stimuli produced and reacted with by cone photoreceptors in the eye. Color vision deficiency, or “color blindness,” manifests as a loss of color perception to one or many color wavelengths. Often, color vision deficiency is a congenital disorder, though it may be produced by physical or chemical damage to the eye, optic nerve, or brain. Color vision deficiency affects a large portion of individuals, occurring with much greater frequency in men than in women. Deficiencies in the red-green fields are most common. While color vision deficiencies are not treatable, people with the disability generally do not notice a significant negative impact in their daily activities. Examinations in childhood will often pick up on these deficiencies.

Want to test your color vision?! Follow the link below!



Do you know that there are some people who can’t see 3D? Stereoscopic vision in humans gives us our ability to see depth; under normal conditions, the eyes work together to provide vision of an image, along with its depth. In people with limited or no stereoscopic vision (ex: those affected by amlyopia (lazy eye), strabismus (eye turn), or patients with a blind or only one eye), depth perception may be limited or nonexistent. In patients with limited stereoscopic vision due to strabismus or amblyopia, treatments may be available to correct vision in the impaired eye, possibly providing some development of stereoscopic vision, though treatment as early as possible is desirable to ensure that possibility.

Want to test your stereovision?! Follow the link below!