The strength of a Hundred Seals jutsu is a unique jutsu which demonstrates the user’s exceptional chakra control. The user reserves and saves her chakra at a particular point in one’s body and then when the time comes the user releases this seal and thus gets a humongous chakra boost. This large amount of chakra enhances each and every jutsu that the user is using.
Also, this technique heals almost every wound suffered by the body instantaneously. Thus for the time being the user is almost immortal. Even if a knife is driven through the user’s heart while using this jutsu, the heart will heal itself. So, if Sarada Uchiha will master this amazing jutsu which I’m sure she will eventually. This will grant her the ability to use her Mangekyou Sharingan without losing her sight.