What is (are) Blue cone monochromatism ?
Blue cone monochromatism is an inherited X-linked vision disorder. In this condition both red and green cone sensitivities are absent, however rod function and blue cone sensitivities are present. Signs and symptoms include severely reduced visual acuity (clearnes), eccentric fixation, infantile nystagmus that decreases with age, no obvious retinal abnormalities, and poor or no color discrimination.