Hi,

If you have this situation, where eyes are:

  • White
  • Black
  • Green

in:

  • Maya
  • Unreal
  • etc

It is probably due to the lens/ eye corneas meshes. You can:

  • Hide them (in Maya Outliner)
  • Delete them
  • Not selecting them while exporting

Or:

Assign water/glass like shader in Maya/ Unreal/ etc to have the eye highlights