Human cone-rod dystrophy sufferers are sighted at birth, but lose first their central colour vision in early adulthood, before slowly losing their peripheral black and white vision as well.

• 人类遗传性锥体杆体营养不良患者出生时视觉正常，但成年早期即丧失中央性色觉，进而逐渐丧失外周性黑白视觉。