A round, central opening or "eye" in a dome.(pr. AH-cyə-ləs)Example:Interior view of the Pantheon, Rome, 118 CE. At the top of the Pantheon's coffered dome is its oculus. In this photo, sunlight projects through this open hole to the sky. There has never been any glass or other cover on this opening. Anticipating the rains, the Romans placed twenty-two small drains in the floor. They continue to function well today.Also see circle, fenestration, lantern, lunette, omphalos, and pantheon.

Your data and time are valuable. There's a new web browser that considers your time and security as a top priority.

Download Brave Browser For Free!

Brave uses the latest in blockchain technology.

This ensures a higher quality and more secure experience. Learn more about this fantastic breakthrough.

Loads Content Up To 8X Faster

Because Brave blocks unwanted tracking scripts that run in the background, your browsing speed will be unparalleled.

Ultimate in Privacy & Security

Brave fights malware and prevents tracking, keeping your information safe and secure.