Diagnostic Tests Fundus Photography A non-invasive procedure in which photographs are used to document the internal structures of the eye. Corneal Topography An examination technique that allows us to analyze the physical features and shape of the anterior surface of the cornea. Specular Microscopy A non-invasive procedure in which photomicrographs are used to evaluate the structure and function of the corneal endothelium. Visual Field Examination A test that measures the combined function of the retina, optic nerve and visual pathways in the brain. Retinal Scanning Lasers These instruments perform a structural evaluation the retinal layers and optic nerve.