What if! There were no 'light eyes' in the past, only 'dark eyes'. What if, the 'light eyes' came to existence due to shardblades turning your eyes light when bonding and continued the bloodline going forward?
My landlord was asking me weird personal questions so I set up a security camera in my room. He has previously said he never goes in tenants' rooms, but I found out he looks around in my room every day after I leave for work.