These are the four events when Tryambaka Deva (Lord Shiva) opened his third Eye.
To Burn kamadeva into remains
At the point when Lord Shiva was extremely frustrated on the demise of his first spouse Sati, shiva began his excursion into reflection. Even after when Sati was reborned as Parvati, he didn't emerge from his meditataion. This was the point at which the divine beings requested that Kamadeva wake him up from his contemplation. So as to break his reflection Kamadeva shot a bolt of adoration towards him. In spite of the fact that, it did waked him up, he was so maddened and opened his third eye and consumed Kamadeva into sacred remains. Anyway Kamadeva was brought back later.
To Light-up the whole universe
When Parvati devi shut both according to Lord Shiva's with her hands, the entire universe ran into dimness, so as to give light and energy to the universe he needed to open his third eye. The warmth which was brought about by his third eye brought about perspiring of Devi Parvati's hand. When the drop fell onto the ground, Andhaka was conceived, He was raised by one of his Asura Devotee. Shiva favored Andhaka by saying that he would pass on just on the off chance that he wants for a lady he shouldn't. Before long at that point, Andhaka succumbed to Parvati's excellence and attempted to pursue her yet inevitably got slaughtered by Lord Shiva himself.
The Birth of Jaladhara
As indicated by Mythology, When Indra and Brihaspati were going to Kailash to meet Lord Shiva, they were obstructed by a Hermit. The Hermit was undoubtedly shiva himself, attempting to test the information on Indra. In any case, indra couldn't understand that the loner was Shiva and requested that he move away from their way. The Hermit stayed calm. Maddened Indra on observing the quiet of the loner, not moving/answering him. Indra attempted to slaughter the loner with his vajra and Lord Shiva deadened Indra's hands immediately and opened his third eye to consume Indra to cinders. All at once Brihaspati understood that the Hermit was Shiva himself and asked to exonerate Indra for the slip-up he has done. Incapable to control his indignation he some way or another turned his third eye towards the sea and in this way Jaladhara was conceived from it. Be that as it may, Jaladhara turned into an asura and was at long last slaughtered by Shiva.
Pippalada was really the child of sage Dadhichi. As the sage was murdered by the Gods, Pippalada got enraged and should deliver retribution for his dad's passing over the divine beings. So he began his tapas for shiva, Shiva show up before him and approached him for the desires. At the point when, Pippalada requested that Lord Shiva execute the divine beings, Shiva acknowledged his desire, just on one condition that he will slaughter them simply by opening his third eye and that also can be opened simply by a troublesome tapas. Pippalada at that point played out the tapas and requested that he open his third eye and he effectively opened it, yet soon as he opened it an evil spirit showed up from Lord Shiva's eye and attempted to assault Pippalada first. Pippalada was very stunned and asked Lord Shiva that for what good reason the evil presence assaulted him and not the Gods, Shiva at that point revealed to Pippalada that Pippalada's body was itslef made of Gods. before long then Pippalada understood his misstep and overlooked his vengeance as executing the Gods won't restore his dad back.