Method and a system for determining shape and appearance information of an ocular prosthesis for a patient, a computer program product, and a conformer

A system for determining shape and appearance information of an ocular prosthesis for a patient for the manufacturing of the ocular prosthesis by a device, the system comprising:

• at least one imaging device configured to generate shape information for the ocular prosthesis, wherein generation of shape information includes imaging an eye socket or an existing ocular prosthesis;
• at least one evaluation unit configured to determine the shape of the ocular prosthesis depending on the shape information;
• at least imaging device for generating appearance information for the ocular prosthesis by capturing an image of a patient's eye, wherein appearance information include color information,
• at least one means for fusing the shape and the appearance information provided by the evaluation unit or a further evaluation unit,
• wherein the determination of the shape of the ocular prosthesis includes:
• determining the shape based on a mathematical or analytical shape model, said mathematical or analytical shape model being determined based on the shapes of existing prostheses and being a parametrized representation of the shape, or
• determining the shape by generating shape information of an existing patient-specific prosthesis, the shape information representing the shape of the existing prosthesis, and transforming it into a uniform shape representation, the uniform shape representation including a set of vertices representing the shape of the existing patient-specific prosthesis, wherein the vertices correspond to vertices in a set of vertices representing the shape of a further prosthesis,
• and/or
• wherein the generation of appearance information includes color imaging the patient's eye and performing at least one of:
• performing an inhomogeneous illumination correction of the captured image, and
• performing a color characterization with the same or similar viewing conditions as a color characterization of the device used for the manufacturing of the ocular prosthesis based on the appearance information, the viewing conditions including conditions on the illumination and the observer, and wherein similar viewing conditions are provided if a similarity measure relating to the viewing conditions and representing how similar viewing conditions are is higher than a predetermined threshold value.