Hi, one of the eyes has got a deformation along the top edge. Initially I thought it must have been a duplicate edge inside there, but it looks fina and there is no extra edge there. see picture for reference.
Thank you in advance
Did you check your Normals? Enable the Overlay for Face Orientation:
Everything should be blue. If not, select all in Edit Mode and press SHIFT+N > Recalculate Normals.
Awesome, thank you for the reply. That was my issue in the end.