The invention relates to an eye training system (1) with the spectacles (10) that comprise at least the following components: A frame member (11) configured to keep the spectacles (10) on the head of a person wearing the spectacles (10), two optical assemblies (12) arranged at the frame member (11), wherein the optical assemblies (12) are arranged such at the frame member (11) that when the spectacles (10) are worn on the head of the person said optical assemblies (12) are in front of the eyes of the person, wherein each optical assembly (12) comprises a focus-tunable lens (13) with an adjustable focal length, a control circuit (22) comprising a processor, wherein the control circuit is configured to control the focal lengths of the focus-tunable lenses (13) in response to data (200) received from an external computer or provided by the processor. The invention further relates to a method and a computer program for performing eye training with the eye training system (1).