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Completed

NCT Number: NCT01347229

SENSIMED Triggerfish® in Sitting and Supine Position

The purpose of the study is to evaluate changes in intraocular pressure (IOP) between sitting and supine body positions and correlate the values obtained with conventional tonometers to the output provided by the investigational device.

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Key information

Conditions

Healthy Subjects Eye Diseases Glaucoma Ocular Hypertension

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Assaf Harofeh Medical Center

Ẕerifin, 70300, Israel

About this study

20 subjects will be enrolled in the investigation. Eligible subjects will receive one session of 22-hour continuous IOP monitoring with SENSIMED Triggerfish® in ambulatory mode, with body position transitions carried out in-hospital. SENSIMED Triggerfish® will be installed randomly on right or left eyes and the IOP recording will be initiated as soon as the adaptation of the device on the subject's eye is satisfying. Subjects will then go home. The next morning, subjects will return to the hospital and during SENSIMED Triggerfish® monitoring on one eye, IOP measurements will be taken in the fellow eye in sitting position using Goldmann, tonopen and pneuma-tonometers. Then subjects will lie down on a flat bed. After 15 ± 5 minutes and again after 45 ± 5 minutes IOP will be measured in supine position, using Goldmann, tonopen, pneuma-tonometer and Perkins tonometers. Then subjects will sit up again. After 30 ± 5 minutes IOP will be measured with the Goldmann tonometer.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Subject is able to provide informed consent
  • Healthy subject, with no previous ocular medical history, with the exception of spectacle vision correction for myopia, hyperopia and astigmatism
  • No more than 4 diopters spherical equivalent
  • No more than 2 diopters cylinder equivalent
  • GAT IOP of less than or equal to 21 mmHg at inclusion and open iridocorneal angles, no history of any IOP > 21 mmHg
  • GAT IOP difference between eyes within 1 mmHg during initial exam
  • GAT IOP differences between initial sitting and supine positions, between left and right eyes, within 2 mmHg during initial exam
  • ≥ 18 years
  • For women with childbearing potential, adequate contraception

Exclusion criteria

  • Subjects with contraindications for wearing contact lenses
  • Severe dry eye syndrome
  • Keratoconus or other corneal abnormality
  • Conjunctival or intraocular inflammation
  • History of eye surgery
  • Full frame metal glasses during SENSIMED Triggerfish® recording
  • Known hypersensitivity to silicone, plaster or ocular anesthesia
  • Pregnancy and lactation
  • Simultaneous participation in other clinical studies

Treatment and study plan

SENSIMED Triggerfish®

Device

Soft contact lens-based device for the continuous monitoring of IOP fluctuations

Primary outcomes

  1. Difference in study device signal and GAT IOP between the sitting and supine positions during the sitting-supine sequence

    Time frame: 45 minutes

Secondary outcomes

  1. Difference in Triggerfish® signal and GAT IOP between the sitting and supine positions upon returning to sitting position from supine

    Time frame: 30 minutes

  2. IOP measurements with tonopen and pneuma-tonometer in sitting position, and tonopen, pneuma-tonometer and Perkins in supine position

    Time frame: 2 hours

  3. Monitoring with study device obtained before Day 2

    Time frame: 20 hours

Sponsors and collaborators

Lead sponsor

Sensimed AG

Industry

Registry information

Official study title

Assessment of Sitting and Supine Position IOP Using SENSIMED Triggerfish® and Standard Tonometers

Important dates

Study start
2011
Primary completion
2012
Study completion
2012
First posted
May 4, 2011
Registry last updated
Apr 17, 2012

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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