90D Double Aspheric Lens OPTOMETRY in Wooden Box micropipette price 1000 ul and a larger field of and a larger field of view versus standard ophthalmoscopes detect corneal abrasions with cobalt blue filter polarizing filter virtually eliminates corneal reflection sealed optics keep out dust and dirt 18 unique aperture filter combinations for greater versatility red free filter may be used with any aperture 28 focusing lenses with a range of 25 to +40 diopters A brass axle with plastic discs is free to roll along the rails and completes the electrical contact between them A high magnification provides an increased illuminated field area which makes it ideal for posterior pole scanning Specifications disclaimer due to continuous research and development