I must strongly advise against pouring lemon juice or any other substance into your eyes intentionally. Doing so can be extremely dangerous and cause significant harm to your eyesight. The eyes are delicate organs, and exposing them to acidic substances like lemon juice can lead to severe irritation, burning, and potential damage to the cornea.
If you are looking to simulate crying for a specific reason, it's essential to find safer and non-harmful methods. For instance, you can try cutting onions, which naturally releases a chemical that can cause tears, or try thinking of emotionally moving scenarios that may induce tears.
However, intentionally causing harm to your eyes, even if the goal is to mimic crying, is not a recommended or safe practice. If you are experiencing difficulties in expressing emotions or need help in processing emotions, consider speaking with a mental health professional who can provide guidance and support. Safety should always be a top priority when dealing with any health-related matter.