Through his analysis of Shisui Uchiha's body, eyes, and genes, Simu had finally gained a rough understanding of what the Uchiha Clan called Eye Power.
Specifically, so-called Eye Power was actually a special kind of Kekkei Genkai Chakra.
Like other Kekkei Genkai, there was an exceptionally unusual segment within the part of an Uchiha's genes expressed through the eyes.
When an Uchiha received intense mental stimulation, that segment would be activated, causing a mutation in the eyes to a certain extent and forming what was known as the Sharingan.
When Uchiha ninja infused the Yin Release Chakra they had condensed into their Sharingan, it formed a new and special kind of Chakra. This Chakra was called Eye Power.
The stronger the Eye Power, the stronger the techniques one could perform.
For example, the Genjutsu in which the Uchiha Clan excelled.
Generally speaking, as Uchiha Clan members experienced repeated pain, their Sharingan would gradually evolve.
From the One-Tomoe Sharingan, to the Two-Tomoe Sharingan, and then to the Three Tomoe, the strongest under normal circumstances.
Every evolution of the Sharingan brought an enormous increase in strength to its user, the most important reason being the tremendous rise in the Sharingan's Eye Power.
There was also an extremely powerful suppressive relationship between different levels of Eye Power.
Higher-level Eye Power could easily suppress lower-level Eye Power.
That was why Uchiha Inabi, a Jonin of the Uchiha Clan, had been so easily defeated before Itachi.
If neither side used the Sharingan, Uchiha Inabi still would not have been able to win, but he could at least have held on for quite a while.
Once the Sharingan was activated, however, he would instantly be suppressed by Itachi's Eye Power and dealt with easily.
For example.
Given an Uchiha and another ninja of equal strength, as