The eye meshes go with the following heads:
Eyes1 - Head1-Head5
Eyes2 - Head6 and Head9
Eyes3 - Head7, Head8 and Head10
Eyes4 - Head11
Eyes5 - Head12
Eyes6 - Head13
Eyes7 - Head14
Eyes8 - Head15

Two mirrored hair meshes are included because the hair model flips direction depending on what angle he is viewed from.