The Omega 500® Binocular Indirect Ophthalmoscope, built on the market-leading optical performance of the Omega 180, has been optimized for even better views of the fundus. Optimized Optical System - new multi-coated illumination system including a new XHL Xenon Halogen bulb reduces corneal reflexes and ensures clear, high resolution images of the fundus. Enhanced Variable Pupil Feature - the Patented “Synchronized Adjustment of Convergence and Parallax System” which allows for the precise selection of observation and illumination optics for any pupil size, has been optimized for even better functionality in small pupils down to 1.0mm. Articulating Rear Hinge on Headband - provides vertical adjustment of the rear band of the headband for a secure and perfect fit for all users. New Ergonomic Headband Design - 40% more cushion area and optimal weight transfer with no pressure points. 30% lighter than the Omega 180. Fully Featured - 3 Spot sizes - Large, Medium, and Small. Integrated Diffused light filter. 3 Integrated Filters - Red-free, Cobalt Blue, and Yellow. Redesigned Flip-Up Feature on Headband - Raise optics out of the line of site. Locks at 0, 12.5, 47.5, and 60 degrees. Locking Aperture and Filter Adjustments - Locks your apertures and filters into place. "Safety Clutch" feature protects mechanisms by releasing lock if levers are forced.