Medical data that contain facial images are particularly sensitive as they retain important personal biometric identity, privacy protection. We developed a novel technology called "Digital Mask" (DM), based on real-time three-dimensional (3D) reconstruction and deep learning algorithm, to extract disease-relevant features but remove patient identifiable features from facial images of patients.

Inclusion Criteria:

• The quality of facial images should be clinically acceptable.

Outpatients from strabismus departments, paediatric ophthalmology departments, TAO departments, and ophthalmic plastic departments.