VIP表达主要位于视网膜光感受器外节、内核层、内网状层和脉络膜，神经节细胞层和神经纤维层也有弱表达；

The expression of VIP exists on photoreceptor- outer segment, inner nuclear layer and inner plexiform layer of retina and choroids, and weak expression exists on ganglion cell and nerve fiber layer.

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光感受器节段通过外界膜与外核层发生联系。

Segments of photoreceptor connected with outer nuclear layer via the external limiting membrane.

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