iCare vs Tonopen vs Goldmann Applanation Post-vitrectomy Surgery

Study Overview
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Brief Summary
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The purpose of the study is to compare the measurement of pressure inside the eye using three different FDA-approved devices (Icare, Tonopen, and Goldmann applanation).

Detailed Description
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The three above devices will be used to measure intraocular pressure in patients one day following vitreoretinal surgery. The underlying reason for surgery is not being considered in this study. The measured pressures will be compared across devices in eyes filled with fluid, gas, and silicone oil.

Official Title
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A Comparative Study of Icare Rebound Tonometry With Other Tonometry Modalities in Patients Following Vitreoretinal Surgery.

Conditions
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Intraocular Pressure

Intervention / Treatment
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* Device: Icare rebound tonometry
* Device: Tonopen applanation
* Device: Goldmann applanation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Duke Eye Center patients 18 years or older capacity to give legally effective consent scheduled to undergo vitreoretinal surgery Exclusion Criteria: individuals unable to give consent minors

Ages Eligible for Study
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Minimum Age: 18 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: Diagnostic
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Icare then Goldmann then Tonopen<br>Enrolled patients will be subjected to intraocular pressure measurement using Icare rebound tonometry, Tonopen applanation, and Goldmann applanation. Patients receive Icare first and then are randomized to receive Tonopen followed by Goldmann OR Goldmann followed by Tonopen. This arm is Icare then Goldmann then Tonopen. | Device: Icare rebound tonometry<br> <br> Device: Tonopen applanation<br> <br> * Other names: Tonopen Avia;Device: Goldmann applanation<br> <br> |
| Experimental: Icare then Tonopen then Goldmann<br>Enrolled patients will be subjected to intraocular pressure measurement using Icare rebound tonometry, Tonopen applanation, and Goldmann applanation. Patients receive Icare first and then are randomized to receive Tonopen followed by Goldmann OR Goldmann followed by Tonopen. This arm is Icare then Tonopen then Goldmann. | Device: Icare rebound tonometry<br> <br> Device: Tonopen applanation<br> <br> * Other names: Tonopen Avia;Device: Goldmann applanation<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Measurement of Intraocular Pressure | The primary outcome is the measurement of intraocular pressure on postoperative day #1 following vitreoretinal surgery. | postoperative day #1 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Adverse Events | The secondary outcome is the onset of any adverse events related to measurement of intraocular pressure. | postoperative day #1 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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vitreoretinal surgery, intraocular pressure, applanation, rebound, tonometry