IOP Patterns in Ocular Hypertensive Patients Newly Converted to Glaucoma vs Stable Ocular Hypertensive Patients

Study Overview
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Brief Summary
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The purpose of the study is to assess the relationship between IOP pattern as recorded over 24 hours by using Triggerfish and quantified by acrophase scored dichotomously, and conversion to glaucoma in OHT patients (conversion status). Elevation of IOP above normal range is called ocular hypertension (OHT). In a previous study, it has been shown that OHT patients who progress to glaucoma (converters) have at baseline and prior to any conversion, IOP patterns that more closely resemble those of established early primary open-angle glaucoma (POAG) patients, while stable OHT patients (non-converters) have IOP patterns closer to those of healthy control subjects. The study has been planned to recruit at least 48 eligible patients (24 converters and 24 non-converters).

Official Title
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A Single-center, Open Label, Prospective Study Assessing the 24-hour IOP Patterns Using SENSIMED Triggerfish® in Ocular Hypertensive Patients Newly Converted to Glaucomatous Disease Versus Stable Ocular Hypertensive Patients

Conditions
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Ocular Hypertension

Intervention / Treatment
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* Device: Sensimed Triggersfish® (TF)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Diagnosis of OHT (IOP >21 mmHg on 2 consecutive visits) in the study eye No IOP-lowering drug treatment in the study eye; otherwise, a 4-week wash-out period prior to study day 0 (SD0) and throughout the study Aged ≥ 18 years, of either sex Not more than 6 diopters spherical equivalent in the study eye Having given written informed consent, prior to any investigational procedures Exclusion Criteria: Narrow iridocorneal angle or any other concomitant ocular conditions (except cataract) in the study eye History of ocular surgery on the study eye (except cataract extraction) History of laser treatment on the study eye Corneal or conjunctival abnormality in the study eye, precluding contact lens adaptation Severe dry eye syndrome Subjects with irregular sleep schedules Subjects who are current smokers Subjects with allergy to corneal anesthetic Subjects with contraindications for silicone contact lens wear Subjects not able to understand the character and individual consequences of the investigation Participation in other clinical research within the last 4 weeks Any other contra-indication listed in the TF user manual

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 100 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Ocular hypertension subjects<br>All subjects will be monitored by Sensimed Triggerfish (TF) for 24 hours. | Device: Sensimed Triggersfish® (TF)<br>* All subjects will be monitored by Sensimed Triggerfish (TF) for 24 hours.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Relationship Between Intraocular Pressure (IOP) Pattern as Recorded by TF, and Quantified by Acrophase Scored Dichotomously, and Conversion to Glaucoma in Ocular Hypertension (OHT) Patients (Conversion Status) | For each subject, TF acrophase (ie. time when peak occured) was scored dichotomously (before and after 7 am) and compared between OHT converters and non converters patients. One subject was removed from the analysis because of invalid TF output. | 24 hours | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Acrophase Scored Continuously (i.e. Actual Time of TF Peak Occurrence) | Mean TF acrophase (ie. actual time when peak occured) was compared between OHT converters and non converters. One subject was removed from the analysis because of invalid TF output. | 24 hours | 
| Amplitude of Best-fitting Cosine Curve to 24-hour TF Measurements | This represents an estimate of the magnitude of 24-hour IOP-related variation. One subject was removed from the analysis because of invalid TF output. | 24 hours |