1. Clean and dry the lettuce leaves.
2. Clean, remove the stem, and cut the tomato into small cubes.
3. Clean and dice the cucumber.
4. Drain and crumble the tuna.
5. Crumble the hard-boiled eggs.
6. Mix the mayonnaise, lemon juice, salt, and pepper in a bowl.
7. Add the tuna and hard-boiled eggs and mix well.
8. Place the lettuce leaves, followed by the tomato and cucumber pieces, in the center of the wheat tortillas, along the length.
9. Cover the top with the mayonnaise mixture.
10. Roll the tortillas tightly to form the wraps.
11. Refrigerate the wraps until ready to serve.
12. Enjoy chilled.