Towards Worldwide Comparability of Visual Acuity Assessment (VisComp)

March 8, 2011 updated by: University Hospital Tuebingen

Towards Worldwide Comparability of Visual Acuity Assessment A Pilot Study Comparing ETDRS Visual Acuity Charts, Projected Landolt Charts and the Freiburg Visual Acuity Test (FrACT) With a View to Developing a Mathematical Transformation Routine Between the Results From These Three Tests

Purpose of this study is to investigate the agreement, the test-retest reliability of three established and widely used visual acuity tests, to develop a mathematical transformation routine between the results from these three tests, to assess the examinees´ and examiners´ acceptance and to compare the test durations.

Study Overview

Status

Unknown

Conditions

Detailed Description

Assessment of distant visual acuity is the most frequently used procedure for estimation of visual performance. However, there exist a vast number of markedly differing visual acuity tests worldwide; furthermore there are differing report formats to express acuity. This variety may critically interfere with standardization and comparability of this basic visual test method.

Purpose of this study is to investigate the agreement, the test-retest reliability of three established and widely used visual acuity tests, i.e., the Early Treatment Diabetic Retinopathy Study (ETDRS) visual acuity charts, a conventional projected distant visual acuity test according to DIN 58220 part 3, and the Freiburg visual acuity test (FrACT), to develop a mathematical transformation routine between the results from these three tests, to assess the examinees´ and examiners´ acceptance and to compare the test durations.

Study Type

Observational

Enrollment (Anticipated)

84

Contacts and Locations

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

Study Contact

Study Locations

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

University eye Hospital Tuebingen

Description

Inclusion Criteria:

Clinical diagnosis of:

  • normal ophthalmological status,
  • opacity of the refractive media,
  • maculopathy,
  • optic neuropathy
  • chiasmal and postchiasmal visual pathway pathologies,
  • amblyopia (deprivation),
  • amblyopia (strabism)

Exclusion Criteria:

  • underage person
  • concomitance of different eye-diseases

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
normal ophthalmological status
opacity of the refractive media
maculopathy
optic neuropathy
chiasmal and postchiasmal visual pathway pathologies
amblyopia (deprivation)
amblyopia (strabism)

Collaborators and Investigators

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

Sponsor

University Hospital Tuebingen

Collaborators

University of Freiburg

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

March 1, 2011

Study Registration Dates

First Submitted

March 8, 2011

First Submitted That Met QC Criteria

March 8, 2011

First Posted (Estimate)

March 11, 2011

Study Record Updates

Last Update Posted (Estimate)

March 11, 2011

Last Update Submitted That Met QC Criteria

March 8, 2011

Last Verified

March 1, 2011

More Information

Terms related to this study

Other Study ID Numbers

  • VisComp01

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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