Age-Related Changes and Cycloplegia-Induced Differences in the Human Crystalline Lens

September 30, 2020 updated by: Yune Zhao, Wenzhou Medical University

Age-Related Changes and Cycloplegia-Induced Differences of the Human Crystalline Lens, Schlemm' s Canal and Trabecular Meshwork：an in Vivo Swept-Source Optical Coherence Tomography Study

The ocular biometric parameters of the human crystalline lens including anterior chamber depth (ACD), lens thickness (LT), radii of curvature of anterior and posterior lens (ALR and PLR), lens equatorial diameter (LED), and lens vault (LV), automatically quantified by the CASIA2 (SS-OCT; Tomey, Nagoya, Japan). Images of iridocorneal angle were obtained using CASIA2 and the Schlemm' s canal (SC) and trabecular meshwork (TM) were quantified manually. Both cycloplegia and non-cycloplegia images were obtained.

Study Overview

Status

Completed

Conditions

Detailed Description

Healthy individuals aged between 6 and 90 years, without history of ocular disease (except age-related cataract and/or myopia), were consecutively included from April to May 2019. All participants underwent visual acuity, dry and wet refraction, anterior and posterior segment examination, intraocular pressure (IOP), and axial length (AL) using IOL-Master 700 (Carl Zeiss Meditec AG). Investigators recruited children under 18 years old at a refraction outpatient clinic, who were prescribed cyclopentolate hydrochloride eyedrops (S.A. Alcon-Couvreur N.V., Belguim) for cycloplegic refraction. For adults, they were prescribed compound tropicamide eyedrops (Mydrin-P, Santen Pharmaceutical Co., Ltd, Osaka, Japan), consisting of 0.5% tropicamide mixed with 0.5% phenylephrine hydrochloride, for pupillary dilation in order to perform fundus examination at an outpatient clinic. Exclusion criteria were as follow:ocular diseases other than cataracts; history of eye surgeries or injuries; shallow anterior chamber with a risk of angle closure. The data from right eye was selected for analysis.

Study Type

Observational

Enrollment (Actual)

129

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Zhejiang
      • Wenzhou, Zhejiang, China, 325027
        • Ophthalmology and Optometry Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

6 years to 86 years (Child, Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Healthy individuals aged between 6 and 90 years, without history of ocular disease (except age-related cataract and/or myopia) at Eye hospital of Wenzhou Medical University

Description

Inclusion Criteria:

Healthy individuals aged between 6 and 90 years, without history of ocular disease (except age-related cataract and/or myopia) Must be able to cooperate examination

Exclusion Criteria:

ocular diseases other than cataracts history of eye surgeries or injuries shallow anterior chamber with a risk of angle closure

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Group 1
participants of less than 18 years old
Group 2
participants aged from 18 years to 40 year
Group 3
participants aged from 41 years to 60 years
Group 4
participants over 60 years old

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Paired Comparison Before and After Cycloplegia
Time Frame: 2020.2.3
The cycloplegia-induced differences of parameters was defined as: the post-cycloplegic value minus the pre-cycloplegic value.
2020.2.3
Evaluated the effect of age on the TM/SC morphologies
Time Frame: 2020.2.3
The age-related variations of TM/SC parameters from four age groups were compared.
2020.2.3

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Evaluated the effect of age on the ocular biometric data
Time Frame: 2020.2.3
The age-related variations of ocular biometric data such as axial length (AL), lens thickness (LT), and anterior chamber depth (ACD) from four age groups were compared.
2020.2.3

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Wenzhou Medical University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 1, 2019

Primary Completion (Actual)

May 31, 2019

Study Completion (Actual)

January 30, 2020

Study Registration Dates

First Submitted

September 21, 2020

First Submitted That Met QC Criteria

September 30, 2020

First Posted (Actual)

October 6, 2020

Study Record Updates

Last Update Posted (Actual)

October 6, 2020

Last Update Submitted That Met QC Criteria

September 30, 2020

Last Verified

September 1, 2020

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SSOCT-ocular parameters change

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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