The eye can see only what it is allowed to see. Even if the thing is right in front of him, a person won’t notice it until he is granted permission from on high to see it.

The waning of the moon and its eclipse are damaging to those with weak vision.

Sanctifying the new moon is a segulah for curing weak vision.

Reciting Tikkun Chatzot is also a segulah for curing weak vision.

Pain of the eyes comes because a person has made some vow.

Imposters cause those whom they deceive to suffer pain of the eyes.

When an important person suffers pain of the eyes, he should know that either his son or his student has committed some sin.

Anyone who closes his eyes so as not to look at evil saves himself from humiliation.

A person who is afraid of immoral thoughts because of the beautiful women he sees while out in the street should recite the verse: “Behold, the mighty ones will cry outside” (Isaiah 32:7). This will save him from wandering eyes.

Staring at an etrog is a cure for pain of the eyes.

When those with clear vision look at the knives used by ritual slaughterers, they can see the vessels of the Holy Temple.

Those with clear vision can tell who a person’s Torah teacher is merely by looking at him, provided they already know what his teacher looks like. When a student learns the Torah’s laws from his teacher, his face takes on a resemblance to the one teaching him. This is because Halakhah is the wisdom that makes a person’s face shine (cf. Ecclesiastes 8:1). By receiving the law, he receives a portion of his appearance, their resemblance increasing with each additional law the student receives.

Pain of the eyes is sometimes harmful.

Stealing damages one’s vision.