Towards Worldwide Comparability of Visual Acuity Assessment (VisComp)

University Hospital Tuebingen

Status: Unknown

Conditions: Comparison of Visual Acuity Tests.; ETDRS. FrACT. Landolt Rings.

Study type: Observational

Funder types: Other

Identifiers

NCT01312662

VisComp01

Details and patient eligibility

About

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.

Full 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.

Enrollment: 84 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

84 participants in 7 patient groups

normal ophthalmological status

opacity of the refractive media

maculopathy

optic neuropathy

chiasmal and postchiasmal visual pathway pathologies

amblyopia (deprivation)

amblyopia (strabism)