Keeler Standard Ophthalmoscope 2.8V On Slim Line Handle Keeler standard ophthalmoscope maintains the simplicity of the original standard design with additional features to enhance your examination. • The positive may wheel lems control aloows you to click through lens powers from +40 to -25D allowing detailed examination of the ocular structres and provides ease of use for spectacle wearers • Two diagnostic beams - a wide angle beam for general examination and a macular beam for more detailed examination of the central retina • A red free filter for enhanced vessel examination can be used with both diagnostic beams, and is particulary useful for diabetic assessment and monitoring • The integral soft brow rest allows for easy positioning and protects your lenses if you are a spectacle wearer. Two apertures: Wide angle - for diagnosis through a dilated pupil. Macular - designed to reduce excessive papillary reaction or patient discomfort. One Filter: Red free - for examination of blood vessels in fine detail, particularly useful for diabetic assessment.