Holy Zohar text. Daily Zohar -72.

The two sparks of light of the letter צ, Tzadi, are the two dots of Tzerei (two horizontal dots under the letter). Their root is in Israel Saba and Tevunah, which are the lights that flow to Chokmah and Binah from Keter. This is represented by the shape of the letter Tzadi צ that is built from two heads, the Letter Yod י and the bent forward letter Nun נ.
The eyes are like the Tzerei, at the level of Chokmah and this level radiates from the person’s eyes.
Looking into a person’s eyes make a connection to his spiritual level and find how deep he is.

Eyes conection is not recommended as a regular exercise. It may cause hi level connection or disconnection. It is like connecting two power of an electrical circuit. If both are on the same “circuit” it can be “positive” channeling of creative energy and if not it could create “short circuit” and burn the connected elements.
Evil eyes could drain you energy and create long term damage so don’t take risks. Better not look deep into a persons eyes until you feel positive around him.

The eyes may look passive but it is the driving force of creation.
The word Tzerei צרי has the same letters of יצר (יצירה, create, formed).
Manifestation power in Malchut depend on the level of connection to Chokmah. Whatever you are able to see in your mind you can manifest. That is the secret of Tzerei and “The Secret” of transforming your vision to reality.

מקור הקטע: הקדמת תיקוני הזוהר עם פרוש מעלות הסולם (רבי יהודה צבי ברנדויין זל) פסקה 358