Introduction of an Internet-based Near and Intermediate-vision Reading Test for Greek-speaking Normal and Low Vision Adults (wDDART): Development and Validation.
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Presbyopia
- Sponsor
- Democritus University of Thrace
- Enrollment
- 100
- Locations
- 2
- Primary Endpoint
- Maximum Reading Speed (MRS)
- Status
- Completed
- Last Updated
- 5 years ago
Overview
Brief Summary
Primary objective of our study is to develop and validate an internet-based digital near and intermediate-vision reading test in the greek language.
Detailed Description
Present study aims to develop and validate a computer-based digital near-vision reading test (web Democritus Digital Acuity Reading Test - wDDART) based on the validated digital DDART. Specifically, present study aims to develop a new online reading test (wDDART) based on the corresponding digital DDART reading test for Windows and to evaluate the level of agreement between the two reading tests, as well as test-retest reliability of the online wDDART reading test. The first part of the study is the development of the online reading test, which will include the following new smart features: 1. Automatic calculation of the reading time of each sentence (each logMAR) 2. Automatic calculation of the basic reading parameters - RA, MRS, CPS, ACC - immediately after the completion of the examination 3. Adjustment of the font size according to the size of the computer screen used for the examination 4. Real time calculation of the patient-screen distance through a face detection system The second part of this study is the clinical validation of the online wDDART reading test. In this part, four reading parameters measured with the digital and the online version are compared. These parameters are the following: 1. Reading Acuity (RA) 2. Maximum Reading Speed (MRS) 3. Critical Print Size (CPS) 4. Accessibility Index (ACC) All the comparisons take place in two groups: a) a Normal Vision Group (NVG), and b) a Low Vision Group (LVG) in order to estimate the reading capacity in a population with a wide range of vision.
Investigators
Georgios Labiris
Professor (Associate) of Democritus University of Thrace
Democritus University of Thrace
Eligibility Criteria
Inclusion Criteria
- •Adequate literacy of written Greek language
- •Age between 18 to 75 years
Exclusion Criteria
- •Attention-deficiency
- •Former diagnosis of mental and/or psychiatric diseases
Outcomes
Primary Outcomes
Maximum Reading Speed (MRS)
Time Frame: through study completion, an average of 3 months
The patient's reading speed (measured in wpm) when reading is not limited by print size. It is calculated by averaging the reading speed of the sentences with print size larger than the CPS.
Critical Print Size (CPS)
Time Frame: through study completion, an average of 3 months
The smallest print size (measured in logMAR) that can be read with the MRS, i.e., with speed greater than or equal to the average reading speed of the larger logMAR print sentences minus 1.96 times the standard deviation (SD) of the reading speed of these sentences.
Reading Acuity (RA)
Time Frame: through study completion, an average of 3 months
The smallest print that can be read by the patient easily (measured in logMAR). It is calculated by the following formula: RA = 1.4 - (sentences x 0.1) + (errors x 0.01).
Accessibility Index (ACC)
Time Frame: through study completion, an average of 3 months
The mean reading speed of the 10 largest print sizes at 40 cm (1.3 to 0.4 logMAR), divided by 200 wpm, which is the mean reading speed of normally sighted young adults aged 18 to 39 years old. This parameter was designed for better evaluation of one's access to text across the range of the 10 most common print sizes found in everyday life. For instance, a value of 0 means no access to commonly encountered printed material, while 1.0 is the mean value for normally sighted young adults that indicates reading fluency within the everyday life print sizes.
Secondary Outcomes
- Intraclass Correlation Coefficients (ICCs) for study participants(through study completion, an average of 3 months)