Intraocular Pressure Measured by a Novel Sensing Contact Lens Versus Tonometry

Inclusion Criteria: * Informed Consent * A clinical diagnosis of primary open angle glaucoma (POAG), including normal tension glaucoma (NTG), for OAG patients * A clinical diagnosis of OHT, for OHT patients * For all patients: Open angles on gonioscopy Aged ≥ 18 years, either gender Both central corneal radii (CCR) between 7.3mm (46.23D) and 8.05mm (41.93D), with a maximum difference of 2D between the 2 radii in the study eye Central corneal thickness (CCT) between 490µm and 600µm in the study eye Exclusion Criteria: * Ocular pathology (other than glaucoma or OHT) * Previous glaucoma, cataract or refractive laser/surgery * Corneal or conjunctival abnormality, precluding contact lens adaptation * Insufficiency of lacrimal secretion * Subjects with allergy to corneal anesthetic * Subjects with contraindications for silicone contact lens wear * Subjects with contraindications for Diamox or Latanoprost or Timolol * Skin irritations, skin eczema or other indications against the wearing of adhesive patches * Subjects unable or unwilling to comply with the study procedures * Subjects lacking the capacity to consent (vulnerable persons) * Subjects with history of cardiac failure, treated cardiopathy or renal failure * Subjects with known cognitive disorders * Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, etc. of the participant, * Participation in another study with investigational drug within the 30 days preceding and during the present study, * Enrolment of the investigator, his/her family members, employees and other dependent persons.