The connection between the pineal gland and the Eye of Horus is a subject of esoteric and mystical interpretations rather than mainstream scientific understanding. Here's an overview of the association:

1. The Pineal Gland: The pineal gland is a small, pinecone-shaped gland located in the brain's central area. It produces melatonin, a hormone that regulates sleep-wake cycles and has been associated with spiritual experiences by some cultures and belief systems.

2. The Eye of Horus: The Eye of Horus, also known as the Wedjat Eye, is an ancient Egyptian symbol representing protection, healing, and royal power. It is associated with the god Horus and is often depicted as a stylized human eye with distinctive markings.

3. Esoteric and Mystical Interpretations: In some esoteric and mystical traditions, there is a belief that the pineal gland is the physical representation of the "third eye." This concept suggests that the pineal gland is associated with spiritual insight, intuition, and higher consciousness.