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The Intraocular Pressure Measured by Different Tonometers in Corneal Edema

NCT ID: NCT01998568

Last Updated: 2017-11-06

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

50 participants

Study Classification

OBSERVATIONAL

Study Start Date

2013-11-30

Study Completion Date

2016-06-30

Brief Summary

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The investigators conduct this study to access the effect of corneal edema (the investigators are particularly interested in those who have the clinical central corneal edema) on the variation of intraocular pressure values measured by 3 commercial-available tonometers compare to the current gold standard tonometer; Goldmann applanation tonometer.

Detailed Description

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Previous published articles reported on the effect of corneal edema on the accuracy of tonometry were performed in enucleated cadaver eyes, or contact lens-induced corneal edema eyes. Thus, it remains unclear as to how the clinical corneal edema that is found in routine clinical practice will affect the variation of intraocular pressure measurement using the standard Goldmann applanation tonometer and other more modern tonometers such as the dynamic contour tonometer, the iCare, and the Tonopen.

Conditions

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Intraocular Pressure Corneal Edema

Keywords

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Intraocular pressure Corneal edema Tonometer Dynamic contour tonometer Tonopen iCare Goldmann applanation

Study Design

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Observational Model Type

CASE_ONLY

Study Time Perspective

CROSS_SECTIONAL

Study Groups

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Corneal edema

Intraocular pressure measurement

Intraocular pressure measurement

Intervention Type OTHER

Using different tonometers for intraocular pressure measurement

Interventions

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Intraocular pressure measurement

Using different tonometers for intraocular pressure measurement

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Age more than 18 year-old
* Patients who have a clinical central corneal edema after clear cornea phacoemulsification and intraocular lens implantation
* Agree to participate in the study and willing to sign an informed consent

Exclusion Criteria

* Combined phacoemulsification and trabeculectomy
* Clear cornea phacoemulsification that has suture on the cornea
* Previous history of intraocular surgery, ocular trauma prior to phacoemulsification
* Vitrectomized eye
* History of glaucoma or ocular hypertension or using IOP lowering medication
* History of diabetic retinopathy staged as severe non-proliferative or worse
* Pregnant or breast-feeding women
* History of refractive surgery or any keratoplastic procedure
* Corneal opacities or diseases making no suitable tonometry
* Severe dry eye syndrome
* Wears contact lenses
* Astigmatism higher than 2.5 diopters
* Microphthalmos or buphthalmos
* Subjects with having poor or eccentric fixation or nystagmus
* Excessive eye squeezing
* Known allergy to topical anesthesia
* Known allergy to fluorescein solution
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Prince of Songkla University

OTHER

Sponsor Role lead

Responsible Party

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Weerawat Kiddee

Doctor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Weerawat Kiddee, MD

Role: PRINCIPAL_INVESTIGATOR

Prince of Songkla University

Locations

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Faculty of Medicine, Prince of Songkla University

Hat Yai, Changwat Songkhla, Thailand

Site Status

Countries

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Thailand

Other Identifiers

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56-451-02-1

Identifier Type: -

Identifier Source: org_study_id