A system for performing measurements of an eye comprises: a measurement tool that measures the eye, at least one rest that maintains a facial measurement position and defines a centering rest portion that maintains a lateral facial measurement position； an adjuster mechanism that moves an objective of the measurement tool relative to the eye； and a processing unit configured to control the system. The unit controls the system to position, for a first eye, the objective at a predefined first pre-scan position； scan the objective away from the first pre-scan position until the system detects a pupil of the first eye； and trigger one or more measurements of the first eye dependent on the system detecting the pupil of the first eye.
