Optical arrangement and method for ascertaining the orientation of an artificial lens

An optical arrangement for determining orientation of an artificial lens in an eye having a cornea with a front side, the optical arrangement comprising at least one observation beam path with an imaging optical system, at least two light-emitting test objects that each have a defined contour, and one collimation optical system per test object for collimating a light pattern emanatable from the test object into a collimation beam path that is directable at the eye, wherein

• a) the at least one observation beam path comprises multiple observation beam paths with different imaging properties, which multiple observation beam paths are all directable toward a common ocular and which are adjustable such that light patterns reflectable by different boundary surfaces selected among the front side of the cornea and boundaries between the artificial lens and optical media of the eye are able to be simultaneously imaged, or
• b) the at least one observation beam path comprises only a single observation beam path that is adjustable in its imaging properties such that light patterns reflectable by different boundary surfaces selected among the front side of the cornea and boundaries between the artificial lens and optical media of the eye are able to be imaged sequentially.