A New Measurement of Anseikonia Tolerance

NCT ID: NCT03832335

Last Updated: 2019-02-06

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

UNKNOWN

Total Enrollment

31 participants

Study Classification

OBSERVATIONAL

Study Start Date

2015-07-31

Study Completion Date

2020-12-31

Brief Summary

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Population 1:

Measure the effect of size glasses from1-9% on stereopsis

Population 2:

Measure the effect of size glasses from 1-9% on stereopsis in two settings:

* before and after cataract surgery
* after dilation of the eye

Detailed Description

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Population 1:

21 eye healthy phakic individuals. Measurements: baseline stereopsis and stereopsis after size glass (1-9%) is added in front of the right eye and in front og the left eye. This measurement provides details on how much size difference a person can endure without impairing stereopsis.

Population 2:

11 phakic eye healthy individuals awaiting cataract operation on both eyes. Measurements are the same as population 1 but this study group is also measured after dilating the eyes. This is to see if accommodation affects the measurement. A postoperative measurement six weeks after cataract operation is also performed to examine if cataract operation affects the measurement.

Conditions

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Aniseikonia Anisometropia and Aniseikonia

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Phakic group

21 eyehealthy individuals examined for baseline stereopsis and impact of aniseikonia on stereopsis. An non-invasive measurement.

Measurement of aniseikonia tolerance

Intervention Type DIAGNOSTIC_TEST

Adding sizeglasses of different percent before right and left eye and measure the impact on stereopsis

Cataract group

11 patients awaiting cataract surgery on both eyes. Measurement of baseline stereopsis and impact of artificial induced aniseikonia on stereopsis. A non invasive measurement that are repeated after dilatation of the eyes and again six weeks after surgery.

Measurement of aniseikonia tolerance

Intervention Type DIAGNOSTIC_TEST

Adding sizeglasses of different percent before right and left eye and measure the impact on stereopsis

Interventions

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Measurement of aniseikonia tolerance

Adding sizeglasses of different percent before right and left eye and measure the impact on stereopsis

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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Inclusion Criteria

* No previous eye history
* cataract grade \<= 1
* visual acuity above 0.8

Exclusion Criteria

* lack of cooperation
* amblyopia
* axial anisometropia
* ametropia
Minimum Eligible Age

60 Years

Maximum Eligible Age

95 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Glostrup University Hospital, Copenhagen

OTHER

Sponsor Role lead

Responsible Party

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Therese Krarup

Principal investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Rigshospitalet-glostrup

Glostrup Municipality, Danmark, Denmark

Site Status RECRUITING

Countries

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Denmark

Facility Contacts

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Therese Krarup, MD

Role: primary

+4528577271

Birgit Sander

Role: backup

+4538633863

Other Identifiers

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04127

Identifier Type: -

Identifier Source: org_study_id

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