Status:
COMPLETED
Comparison of the Freiburg Visual Acuity Test (FrACT) With the EDTRS- and Landoltring Charts
Lead Sponsor:
Schiefer Ulrich
Conditions:
Ophthalmologically Normal Subjects
Eligibility:
All Genders
18+ years
Brief Summary
A) For the investigation of Visual acuity, inter-test agreement and the test-retest reliability were used three different visual acuity tests: ETDRS charts, Landoltring chart and Freiburg Visual Acuit...
Detailed Description
1. FrACT (internet version 3.8.1) 1.1 haptic Landolt Ring device (FrACTh) 1.2 modified keypad with Landolt Ring symbols (FrACTk) 2. ETDRS Visual Acuity Tester (Steinbeis Transferzentrum Biomedizinisch...
Eligibility Criteria
Inclusion
- age ≥ 18 years
- Minimum distant visual acuity (without/with correction) 0.2 (Visucat, single letter optotypes \[numbers\], initial session). As long as minimum distant visual acuity limits are exceeded, test runs without optical corrections are preferred in order to enhance the spectrum/variety of tested visual acuity values
- Ametropia:
- maximum myopia sph -2.00 dpt maximum hyperopia sph +5.50 dpt maximum astigmatism cyl 2.5 dpt
- informed consent
Exclusion
- Epilepsy / psychiatric disorders
- Drugs affect the reaction time and / or determining the visual acuity, or the refractive power of the eye
- Ophthalmic Education
- Amblyopia
- strabismus
- Glaucoma IOP\> 22 mmHg
- Nystagmus
- Diabetic retinopathy (blood sugar-related retinal disease)
- Very dry eyes (sicca symptoms)
- eye surgery back are less than 3 months
- Infectious diseases (conjunctivitis, corneal inflammation, choroidal inflammation)
- miosis drugs
- Pronounced eye injuries
- Other eye disorders that affect the image quality
- Macular diseases
- albinism
Key Trial Info
Start Date :
June 1 2014
Trial Type :
OBSERVATIONAL
Allocation :
ACTUAL
End Date :
June 1 2015
Estimated Enrollment :
25 Patients enrolled
Trial Details
Trial ID
NCT02198534
Start Date
June 1 2014
End Date
June 1 2015
Last Update
November 23 2016
Active Locations (1)
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1
University of Applied Sciences, Study Course Ophthalmic Optics
Aalen, Baden-Wurttemberg, Germany, 73430