title: The Amster grid test in radiotherapy.
abstract: The author reports on the use of the Amster grid test to document and quantitate the results of radiation therapy. The test can be done by the patient at home and requires him to indicate on a piece of graph paper which lines appear distorted as he looks at the centered dot in the grid. It is rapid, inexpensive, and allows the therapist to compare various regimens and dosage schedules.
mesh_terms: D006801:Humans; D011878:Radiotherapy / Q000379:methods*; D014794:Visual Fields