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Towards Worldwide Comparability of Visual Acuity Assessment (VisComp)

The recruitment status of this study is unknown because the information has not been verified recently.
Verified March 2011 by University Hospital Tuebingen.
Recruitment status was  Recruiting
Sponsor:
Collaborator:
University of Freiburg
Information provided by:
University Hospital Tuebingen
ClinicalTrials.gov Identifier:
NCT01312662
First received: March 8, 2011
Last updated: NA
Last verified: March 2011
History: No changes posted
  Purpose

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.


Condition
Comparison of Visual Acuity Tests.
ETDRS. FrACT. Landolt Rings.

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: 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

Further study details as provided by University Hospital Tuebingen:

Estimated Enrollment: 84
Study Start Date: March 2011
Groups/Cohorts
normal ophthalmological status
opacity of the refractive media
maculopathy
optic neuropathy
chiasmal and postchiasmal visual pathway pathologies
amblyopia (deprivation)
amblyopia (strabism)

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.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

University eye Hospital Tuebingen

Criteria

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
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01312662

Contacts
Contact: Felix Tonagel, MD ResearchGroupVisualPathway@googlemail.com

Locations
Germany
Institute for Ophthalmic Research, University of Tuebingen Recruiting
Tuebingen, Germany, 72076
Contact: Felix Tonagel, MD       ResearchGroupVisualPathway@googlemail.com   
Sponsors and Collaborators
University Hospital Tuebingen
University of Freiburg
  More Information

No publications provided

Responsible Party: Prof. Dr. med. Schiefer, Institute for Ophthalmic Research, University of Tübingen
ClinicalTrials.gov Identifier: NCT01312662     History of Changes
Other Study ID Numbers: VisComp01
Study First Received: March 8, 2011
Last Updated: March 8, 2011
Health Authority: Germany: Ethics Commission

ClinicalTrials.gov processed this record on November 24, 2014