Biometric technology has seen steady growth in deployment over the last decades. This growth is spurred by the increasing need for secure and convenient human authentication schemes, security and surveillance applications, forensics. Recognition technology based on established biometric modalities such as fingerprints, faces, irises can be found in mobile devices, laptops, border crossings, airports, financial facilities and others. While these modalities are well studied and their behaviour in the visible spectrum is well understood, they still, together with ocular modalities, pose open research question in the thermal spectrum. The thermal spectrum offers a lot of research possibilities and the potential for new and better applications. The reason for a focus on ocular region is due to the recent situation with COVID-19 and consequently mask scenarios.