3757 - For eyesight, follow the saying of our sages: 'Be careful with the wine of Kiddush/Havdalah'

"This can also mean that when you reflect on Kiddush (that which you need to make holy) and Havdalah (that which you need to separate from), it will open your eyes to the Truthfulness of Hashem." https://www.torahrecordings.com/rebbe/igroskodesh/011/012/3757