DescriptionSuperZoom 78/90 (Clear) This revolutionary slit lamp zoom lens offers selectively variable power transformation fron 78D to 90D while you are performing your fundus examination.SuperZoom superior power-glide magnification changer provides the smoothest and most reliable operated zoom adjustment available.Volk's high refractive index glass optical design, superior image clariry abd enhanced fundus detail combine to provide improved diagnosis and reduced examination time.Lid Lens Adapter increases stability and is included with purchase. SpecificationField of View: 103? / 124?Image Magnification: .45xPrimary Application: Examination through small pupils