I honestly don't know why you guys are making a big deal out of Sarada's glasses.
Kishi already stated that he did give her glasses simply because he wanted to give her character a sophisticated and intellectual look.
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After the first chapter of Naruto: The Seventh Hokage and the Scarlet Spring, many wondered if Sarada is Karin’s daughter or Sakura’s daughter. We might have to wait a few chapters to find out what ends up transpiring, but according to the guestbook, Sarada is Sakura’s daughter. Masashi Kishimoto, the creator of Naruto, says Sarada is the female version of Sasuke with a bit of darkness, loneliness, a strong heart, and cool temperament.*
However, Kishimoto-sensei felt a female version of Sasuke would be scary so to avoid that, he added some of Sakura’s qualities so she looks cute. Her glasses were to add a sophisticated and intellectual look.*The image from the guestbook asks if Sarada has Sasuke’s bloodline limit to tease readers, but doesn’t give an answer. Based on the image, however, it does seem that she does."
Sarada has never shown any sight issues in the series at all, thus, unless you can come up with a scan that proves she has bad eyesight, she doesn't.
On the top of that, Sarada's 1T is by far the strongest 1T we've ever seen to date. With only 1T, Sarada is able to use all of Sharingan's techniques: copy technique, genjutsu and precog. Not even Sasuke at her age could manage do what she does - to unlock precog, he had to fight Haku and upgrade it to 2T; we only saw Sasuke using Sharingan genjutsu for the first time when he had a fully mastered 3T.