Draize test
The tests are controversial. They are seem as cruel and  unscientific  because of the differences between rabbit and human eyes, and the subjective nature of the visual evaluations. The FDA supports the test, stating that "to date, no single test, or battery of tests, has been accepted by the scientific community as a replacement [for] ... the Draize test". Because of its controversial nature, the use of the Draize test in the U.S. and Europe has declined in recent years and is sometimes modified so that anaesthetics are administered and lower doses of the test substances used. Chemicals already shown to have adverse effects in vitro are not currently used in a Draize test, thereby reducing the number and severity of tests that are carried out.