It's not to be determined exactly in which era the Unalome was created. During the same time, Unalom has been known in Thailand, India, and Nepal. Unalome is also known as the Buddha eye or the third eye of the Buddha.
Unalome in Thailand
Unalom was first discovered in Thailand in the Dvaravati period. which appears on the Buddha image It is a symbol in the middle of Phra Nalat (forehead).
Unalome with Sak Yant tattoos.
Unalome facing right. Unalome Tueamear (Tueamear means female) represents Kindness and popularity.
Unalome facing left. Unalome Tueaphu (Tueaphu means male) represents protection and invulnerability.
Unalome Tueamear (female) and Unalome Tueaphu (male) doesn't mean this is for female or male to wear. It is just how we call Unalome to specific Unalome.