Diagnostic Tests Corneal Topography An examination technique that allows us to analyze the physical features and shape of the anterior surface of the cornea. Retinal Scanning Lasers A procedure that uses low-energy laser to image the structure of the retinal layers and optic nerve. External Ocular Photography A non-invasive procedure in which photographs are used to document conditions of the external structures of the eye. Specular Microscopy A special photographic technique that is used to evaluate the structure and function of the corneal endothelium. Refraction A test that determines the optical power of the eye and measures the combined function of the retina, optic nerve and visual pathways in the brain. Visual Field Examination A test that measures the combined function of the retina, optic nerve and visual pathways in the brain. Optomap Retinal Exam OPTOS laser imaging technology is used for the early detection of retinal disease.