An Explorative Pilot Study of a New Mobile Phone Application Measuring Eye Parameters of Eyes in Patients With SUD

This will be a pre-market, explorative, early feasibility, pilot, controlled clinical investigation designed to collect initial clinical data for Previct Drugs.

Inclusion Criteria:Signed Informed Consent FormMale and femaleA recurrent visitor at Sprututbytesprogrammet in Uppsala defined as visited the clinic within the last three (3) monthsSUD in accordanve with DSM-5 criteria according to investigator/designee judgementAge 18 and aboveNegative urine pregnancy test for all fertile womenBeen informed of the nature, the scope, and the relevance of the clinical investigationVoluntarily agreed on participation and has duly singed the Informed Consent FormExclusion Criteria:Participating in another clinical investigation which may affect the study outcome according to clinical judgementPregnancy or lactatingBlindDeafAny ECG dangerous arrythmia according to the investigator or designee judgementAny disease or condition that may influence pupillary reflexes based on clinical judgementUndergone eye surgery that may influence pupillary reflexes based on clinical judgementNot able to read or understand the local languageAny planned travel or treatment which will make it impossible to participate according to the investigator or designeeAny other condition that as judged by the investigator may make the follow-up or investigation inappropriateThat according to the Declaration of Helsinki is deemed unsuitable for study enrolment