See more with the 78D Lens! Get clear and large views of the central mid-retinal regions with its double aspheric design and field of view. This lens is perfect for doctors who regularly see patients prone to glaucoma and other posterior pole abnormalities. It offers high magnification without drastically diminishing field of view. The 78D is popular as a general diagnosis lens among doctors who prefer a larger ring size than our smaller profile 90D, but dilation is necessary for optimal imaging.