Ultrasound treatment for glaucoma

INTERVENTION: Low frequency ultrasound application externally to the area adjacent to the limbus of the eye. Control is the other eye, where glaucoma is essentially equal ‐ a coin toss determines which is the treated eye. The treatment is one session of approximately 10 minutes. The follow‐up is for six months. CONDITION: Open angle glaucoma ; Eye Diseases ; Glaucoma PRIMARY OUTCOME: Intraocular pressure changes, measured at one day, one week, one month, two months, three months and six months. SECONDARY OUTCOME: Tolerability to the intervention, measured at one day, one week, one month, two months, three months and six months. INCLUSION CRITERIA: 1. Pre‐existing glaucoma or ocular hypertension 2. Aged above 18 years, all genders welcome