Virtual Reality Digital Therapeutics for Seasonal Affective Disorder

Inclusion Criteria: * fluent in English and capable of giving informed consent * 18 or older * resident in the United Kingdom and * able to access internet and attend Anglia Ruskin University's Cambridge campus * must self-identify or have been diagnosed with SAD, with moderate to severe symptoms Exclusion Criteria: * declared suffering from epilepsy (due to the risk that seizures may be triggered by VR use). * currently using photosensitizing medications or have significant retinal pathology, due to potentially detrimental effects of light box use. For other ophthalmologic conditions, consultation with an ophthalmologist will be recommended. * currently receiving active treatment for SAD, including antidepressant medication (less than 3 months), bright light treatment, or psychotherapy (e.g. CBT for seasonal affective disorder).