Comparison of the Freiburg Visual Acuity Test (FrACT) With the EDTRS- and Landoltring Charts
Launched by SCHIEFER ULRICH · Jul 22, 2014
Trial Information
Current as of May 09, 2025
Completed
Keywords
ClinConnect Summary
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 Biomedizinische Optik, Tübingen/Germany)
3. Landoltring chart (Visus GmbH, Stuttgart/Germany)
4. VISUCAT monitor with single optotype display(numbers; Argus Individuell Optic GmbG, Putzbrunn/Germany)
5. Room illuminance level 250 lx, assessed with digital luxmeter (Peak Tech 5025, Peak Tech Prüf - und Messtechnik GmbH, Ahrensburg/Germany)
6. Laptopdisplay (TravelMate, Acer, 8372 Taipeh/China):
luminance ...
Gender
ALL
Eligibility criteria
- Inclusion Criteria:
- • 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 Criteria:
- • 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
About Schiefer Ulrich
Schiefer Ulrich is a dedicated clinical trial sponsor committed to advancing medical research and improving patient care through innovative therapeutic solutions. With a focus on rigorous scientific methodology and ethical practices, the organization collaborates with leading researchers and healthcare professionals to design and implement clinical trials that address unmet medical needs. Schiefer Ulrich emphasizes patient safety and data integrity, ensuring that all studies are conducted in compliance with regulatory standards. Through its efforts, the organization aims to contribute significantly to the development of effective treatments and enhance the overall quality of healthcare outcomes.
Contacts
Jennifer Cobb
Immunology at National Institute of Allergy and Infectious Diseases (NIAID)
Locations
Aalen, Baden Württemberg, Germany
Patients applied
Trial Officials
Ulrich Schiefer, Prof. Dr. med.
Principal Investigator
University of Applied Sciences Aalen
Timeline
First submit
Trial launched
Trial updated
Estimated completion
Not reported
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