Located in the Pre-Function of the Etihad Towers is Oculus – an architectural lighting sculpture made of handcrafted crystal and hand-blown glass components. Oculus weighs an impressive 12 tons in all, consisting of more than 250,000 crystal components and 12,800 artistic hand-blown glass components. Oculus goes far beyond normal glass art and lighting installations. The Oculus’ final diameter is 16 meters and installation of the design required 12 weeks.