The safety and validity of contact lens sensor (Triggerfish) in measuring diurnal variation of intraocular pressure (IOP)

Abstract

With the current understanding of pathophysiology of glaucoma, the reduction of intraocular pressure (IOP) is the main evidence-based treatment which can prevent the progression of visual field defect (1). Several studies have shown that IOP varies throughout the day and night and patients with different glaucoma subtypes can have different circadian IOP patterns (2-4). In clinical practice, most ophthalmologists rely on the single measurement of IOP in clinic at each patient visit to monitor the control of IOP and thereby monitor the control of glaucoma. The peak IOP during after-hours is frequently underestimated by this form of measurement because it can only provide a single temporal value. Therefore, it is clear that in order to better manage glaucomatous patients, it is necessary to keep track of how their IOP changes over time.