视紫质

例句：

1. 1. The retina contains a lot of visual pigments, including rhodopsin and all-trans-retinal.
   视网膜含有大量的视觉色素，包括视紫红素和全反式视黄醇。
2. 2. In the absence of light, rhodopsin is converted to all-trans-retinal by a processcalled isomerization.
   在没有光线的情况下，视紫红素通过异构化过程转化为全反式视黄醇。
3. 3.All-trans-retinal is then transported to the rod cells in the retina, where it is used to detect light.
   全反式视黄醇随后被运输到视网膜中的杆细胞，用于检测光线。