Level of Agreement Between Clinical Defocus Curves and the Web-based Democritus Digital Acuity Reading Test wDDART
NCT ID: NCT04739085
Last Updated: 2021-02-04
Study Results
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Basic Information
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UNKNOWN
100 participants
OBSERVATIONAL
2020-11-20
2021-05-20
Brief Summary
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Detailed Description
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The "defocus curve" assessment technique is a method used widely for the assessment of the functional vision range following multifocal intraocular lens (IOL) implantation. Since this method is a simulation of the near vision, it would be ideal if near vision could be evaluated objectively with a near vision chart. However, the conventional printed near vision charts are not available for a variety of reading distances. In addition, the measurement of near VA at different distances with a printed reading chart intended for one predefined distance (e.g. printed chart for 40 cm) and the transformation of the reading score at 40 cm to an equivalent score for the examined distances is impractical in clinical setting.
For this reason, a digital reading test that allows the text calibration for all reading distances could be a practical method for the rapid and ease evaluation of the near VA, especially in patients implanted with multifocal IOLs. The web-based digital near and intermediate vision reading test wDDART offers the ability to estimate VA at different distances with automated measurement of the patient-screen distance.
Therefore, the present study aims to investigate the level of agreement between clinical defocus curves and the web-based digital near and intermediate vision reading test wDDART.
Conditions
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Study Design
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COHORT
PROSPECTIVE
Study Groups
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Defocus curve group
The monocular distance visual acuity of each participant' eye is evaluated using trial lenses of -3.00 sph, -2.50 sph, -1.75 sph, and -1.25 sph (added to the best correction for distance), which correspond to the distances of 30 cm, 40 cm, 60 cm, and 80 cm, respectively.
Defocus curves - Monocular distance visual acuity with trial lenses added to the best correction for distance
The monocular distance visual acuity of each participant' eye is evaluated using trial lenses of -3.00 sph, -2.50 sph, -1.75 sph, and -1.25 sph (added to the best correction for distance), which correspond to distances 30 cm, 40 cm, 60 cm and 80 cm, respectively.
wDDART group
The same participants undergo visual acuity test via the web-based digital near vision reading test wDDART at 30 cm, 40 cm, 60 cm and 80 cm, having their best correction for distance.
wDDART - Monocular near visual acuity using the best correction for distance
The same participants undergo visual acuity test via the web-based digital near vision reading test wDDART at 30 cm, 40 cm, 60 cm and 80 cm, having their best correction for distance.
Interventions
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Defocus curves - Monocular distance visual acuity with trial lenses added to the best correction for distance
The monocular distance visual acuity of each participant' eye is evaluated using trial lenses of -3.00 sph, -2.50 sph, -1.75 sph, and -1.25 sph (added to the best correction for distance), which correspond to distances 30 cm, 40 cm, 60 cm and 80 cm, respectively.
wDDART - Monocular near visual acuity using the best correction for distance
The same participants undergo visual acuity test via the web-based digital near vision reading test wDDART at 30 cm, 40 cm, 60 cm and 80 cm, having their best correction for distance.
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
40 Years
80 Years
ALL
No
Sponsors
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Democritus University of Thrace
OTHER
Responsible Party
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Georgios Labiris
Professor (Associate) of Democritus University of Thrace
Principal Investigators
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Georgios Labiris, MD, PhD
Role: STUDY_CHAIR
Department of Ophthalmology, University Hospital of Alexandroupolis, Alexandroupolis, Greece
Locations
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Department of Ophthalmology, University Hospital of Alexandroupolis
Alexandroupoli, Evros, Greece
Countries
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Central Contacts
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Facility Contacts
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References
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Labiris G, Panagiotopoulou EK, Chatzimichael E, Tzinava M, Mataftsi A, Delibasis K. Introduction of a digital near-vision reading test for normal and low vision adults: development and validation. Eye Vis (Lond). 2020 Oct 22;7:51. doi: 10.1186/s40662-020-00216-0. eCollection 2020.
Other Identifiers
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ES1/Th4/21-1-2021
Identifier Type: -
Identifier Source: org_study_id
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