Sarada in Boruto: Two Blue Vortex Chapter 31 has showcased that her abilities are something to be feared. But because she used her Mangekyo Sharingan and pushed herself to a limit, this chapter showed us that it comes with consequences. Until now, the fandom has been debating how the creator showed her use of this immensely difficult technique, which is known to damage the user's eyesight. This chapter has prooved that that the information is true because Sarada Uchiha is officially beginning to lose her eyesight.
That discussion ends here as the price has finally arrived. The fight against Mamushi has escalated rapidly as he made hundreds of his clones, who are set free to roam around Konoha. His eye is on Eida and wants to find her as efficiently as possible. The only catch for him when he makes the clones is that they lose intelligence, but what no one anticipated was that they get aggressive. So, Sarada had to take a stand.

As these clones were endangering civilians, Sarada in Boruto: Two Blue Vortex Chapter 31 activates her Mangekyo Sharingan and takes on these clones as if they were nothing to her. Her technique is ruthless and precise. Every clone within her line of sight is lifted, immobilized, and crushed using her overwhelming ocular power.
One thing that is undeniable about her is that she is highly efficient, and her fighting style reminds fans of Sasuke when he was at his peak. She even gave Delta the responsibility to take on the clones, which were out of her vision. The following panels show us the kind of teamwork the duo shares. But then comes the turning point in Boruto: Two Blue Vortex Chapter 31.
Sarada Uchicha has blood coming from her eyes in Boruto: Two Blue Vortex Chapter 31

As Sarada detonates the last wave of clones in her range, something changes. Blood begins to trickle from her Mangekyo Sharingan. Her vision blurs, and black spots cloud her sight. It is unmistakable, they are the same deterioration we saw years ago in Naruto’s story when Itachi and Sasuke pushed their Mangekyo too far. This moment in Boruto: Two Blue Vortex Chapter 31 confirms what longtime fans already knew deep down: the Mangekyo Sharingan always exacts a toll.
Ever since she managed to awaken the power of Mangekyo, many fans were critical of the fact that she did not suffer the side effects. Did the creator change the rules and give her the power of plot armour. Boruto: Two Blue Vortex Chapter 31 has given a straightforward answer that she is no exception, as the panel made it clear that her eyes are losing strength.
As to why it took time, it is because if we look back at Sasuke's story, his blindness did not happen in an instant. The deterioration came gradually, especially as usage intensified. Sarada’s situation mirrors that pattern. In this fight alone, she repeatedly used high-scale ocular abilities to crush nearly 20 Mamushi clones; this was not a minor usage; it was equivalent to spamming devastating techniques back-to-back. The Mangekyo does not punish lightly. It punishes repeatedly. And Sarada has officially crossed that threshold.
Final thoughts
In conclusion, a single panel in Boruto: Two Blue Vortex shows us that using the Mangekyo Sharaingan has its aftereffects on its users. While the pay-off is a little detailed, and it has definitely upset the long-time fans to look at her walking on the path, Itachi did in terms of overusing the ability that is infamusly known to have major consequences. But the only thing the readers will be satisfied with is that the creator has stuck with the original role. And if this is only the beginning of her decline, then the emotional and strategic fallout could redefine the entire future of Konoha.