A Spectacle

An exciting or extraordinary scene, exhibition, performance etc.
An embarrassing or unedifying scene or situation.
(usually in the plural) An optical instrument consisting of two lenses set in a light frame, and worn to assist sight, to obviate some defect in the organs of vision, or to shield the eyes from bright light.
(figuratively) An aid to the intellectual sight.
(obsolete) A spyglass; a looking-glass.
The brille of a snake.