Towards Worldwide Comparability of Visual Acuity Assessment

Comparison of Visual Acuity Tests. Clinical Trial

— VisComp  

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

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT01312662
• Other study ID #: VisComp01
• Status: Recruiting
• Phase: N/A
• First received: March 8, 2011
• Last updated: March 8, 2011
• Start date: March 2011

Study information

• Verified date: March 2011
• Source: University Hospital Tuebingen
• Contact: Felix Tonagel, MD
• Email: ResearchGroupVisualPathway[@]googlemail.com
• Is FDA regulated: No
• Health authority: Germany: Ethics Commission
• Study type: Observational

Clinical Trial Summary

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.

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.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 84
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 18 Years and older

Eligibility

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 Design

Observational Model: Case Control, Time Perspective: Prospective

Related Conditions & MeSH terms

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

Locations

Country	Name	City	State
Germany	Institute for Ophthalmic Research, University of Tuebingen	Tuebingen

Sponsors (2)

Lead Sponsor	Collaborator
University Hospital Tuebingen	University of Freiburg

Country where clinical trial is conducted

Germany,