这种病会逐渐破坏视网膜可以感光的视杆和视锥，但是不会损害视觉神经，视觉神经负责将视网膜神经脉冲传递到大脑。
It gradually destroys the rods and cones that detect light in the retina of the eye. But it does not harm the optic nerve, which transmits electrical impulses from the retina to the brain.
视锥和视杆均含有连接纤毛和辅助外段。
Connecting cilium and accessory outer segment are present in both rods and cones.
视锥和视杆均含有连接纤毛和辅助外段。
Connecting cilium and accessory outer segment are present in both rods and cones.
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