It's been in my community for bout 12 months, all tigers are thriving.
The previous owner which had it since 2 inch is a good friend, so I trust him when he said the eye defect has been present all it's life. It's not something that recently occurred and is getting progressively worse. He has tank with over 20 IT,s and several ntt & pulchers. None have the same defect or any eye related disease.
I'm not ruling out bacterial related though. Though yours seems different, I have a solid White ball on each pupil, outer lens is fine/normal.