网恋者一旦在网下相约见面，就会因为与网上相交时的想象相距太远而使恋爱结束used to describe the sudden end of a relationship when a couple who have interacted online finally meet in the flesh

• 网友们也许都被一条网络定理——“网缘见光死”而吓得望而却步了吧！

  Netizens have perhaps been scared away by the theory that online relationships end as soon as the people involved meet in real life.

• 初次见面时，两人对对方的相貌都有些失望，但还不至于“见光死”。

  When they first met, both parties were somewhat disappointed in the other, but they did not end the relationship.