Ah yes, Where the rulers had a penchant for blinding
any relatives in line for the throne.
They like the Rome they grew out of never resolved that government succession problem and not have a civil war.
Blinding rival claimants to the throne, marginally better then strangling them with a gold/silver/silk thread (I’ve read of examples of all three!) like the Ottomans di!
Looking at 2016 & now maybe we now have the same problem.
Once the Muslims took over, they didn’t just blind relatives, they killed all brothers of the chosen ruler. Since there was a harem, this could be a number of people.