C-DIAG is a specialized diagnostic imaging system designed to assess and document the ocular surface and tear film quality, playing a vital role in the evaluation and management of dry eye disease and other surface disorders. The device integrates multiple diagnostic tools such as non-invasive tear break-up time (NIBUT) measurement, meibography, tear meniscus height analysis, and ocular surface staining evaluation. With its high-resolution imaging and intuitive software interface, C-DIAG enables clinicians to make accurate, objective assessments and tailor treatment plans to each patient's needs. Its compact design and quick examination process enhance clinical efficiency, making it ideal for use in both standalone dry eye clinics and general ophthalmology practices.