Shape changing optical device for ophthalmic testing devices

An optical device, particularly for an ophthalmic device, comprising:

• a container enclosing an internal space of the container, wherein the internal space is filled with a transparent liquid, and wherein the container comprises a transparent bottom and a transparent and elastically deformable membrane opposing said bottom such that the liquid is arranged between the membrane and the bottom,
• a deformable annular lens shaping element connected to the membrane so that a circumferential edge of the lens shaping element defines a central area of the membrane so that light can pass through the container via the central area and the bottom, wherein in a non-deformed state said edge lies in a plane, and
• an adjustable spherical power and an adjustable cylindrical power, wherein for adapting the cylindrical power of the optical device, the lens shaping element is configured to be bent out of said plane,
• wherein the optical device comprises an actuator system that is configured to bend the deformable lens shaping element out of the plane in order to adjust the cylindrical power,
• the actuator system is configured to displace a plurality of points of the lens shaping element along an optical axis of the optical device to bend the deformable lens shaping element out of the plane in order to adjust the cylindrical power
• the actuator system comprises a plurality of actuators, wherein each actuator is configured to displace one of the points, and
• each actuator comprises a mover that is movable towards the lens shaping element along the optical axis of the optical device by means of the actuator, wherein each mover is configured to push against the associated point of the lens shaping element via a point contact.