Amsler grid Amsler grid The Amsler grid, used since 1945, is a grid of horizontal and vertical lines used to monitor a person's central visual field. The grid was developed by Marc Amsler, a Swiss ophthalmologist. It is a diagnostic tool that aids in the detection of visual disturbances caused by changes in the retina, particularly the macula (e.g. macular degeneration, Epiretinal membrane), as well as the optic nerve and the visual pathway to the brain. In the test, the person looks with each eye separately at the small dot in the center of the grid. Patients with macular disease may see
National Dental Examining Board of Canada which in turn is used to apply to individual provinces and territories for licensure. National Dental Examining Board of Canada The National Dental Examining Board of Canada, also known as the NDEB (French: Le Bureau national d'examen dentaire du Canada) is the organization that is responsible for granting approval for dentists to practice in Canada through standardized examinations. Its headquarters are in Ottawa. According to the Act of Parliament, the NDEB is responsible for the establishment of qualifying conditions for a national standard of dental competence for general practitioners, for establishing and maintaining an examination facility to test for this