The<unk> , developed by Australian ophthalmologist Noel<unk> , is a system to plan and analyze the results of refractive surgical procedures, such as laser in-situ keratomileus (LASIK). The<unk>  is also used to plan cataract/toric intraocular lens (IOL) surgical procedures. Introduced in 1993, it has been used in some research studies of LASIK. In 2006 the American National Standards Institute (ANSI) published guidelines based on the<unk> , designed to help manufacturers demonstrate the efficacy of refractive surgical lasers. The<unk>  uses vector mathematics to determine a goal for astigmatism correction and analyze factors involved if treatment fails to reach that goal. The<unk>  can also be used to refine surgical techniques or correct laser settings in future procedures. The<unk>  is one of the “more sophisticated” approaches in analyzing surgical results.
Alpins method
McKenzie method
Ericsson method
Reed–Muench method
Buteyko method
Darrow Yannet diagram
Jaeger chart
Ponseti method