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Near visual function measured with a novel tablet application in patients with astigmatism
- Source :
- Clinicalexperimental optometry. 104(1)
- Publication Year :
- 2020
-
Abstract
- Clinical relevance: While the clinical focus of performance metrics is traditionally based on visual acuity, research from the field of visual impairment has demonstrated that metrics such as reading speed and critical print size correlate much more strongly with subjective patient reported outcomes and assessed ability in real-world tasks. Background: More recently, digital device use has increasingly replaced many paper-based tasks. Therefore, this study aimed to assess the correlation between standard acuity/contrast metrics and functional reading ability compared to real-world performance on an iPad-based reading task with astigmatic patients corrected wearing toric and mean spherical equivalent contact lenses. Methods: Thirty-four adult participants, with −0.75 to −1.50 D of refractive astigmatism, were enrolled in a double-masked cross-over study and fitted with toric and spherical equivalent contact lenses, in random order. A digital application was developed to assess zoom, contrast modifications, the distance at which the tablet was held, blink rate, and time to complete the reading task. High and low contrast near logMAR visual acuity were measured along with reading performance (critical print size and optimal reading speed). Results: The amount participants chose to increase tablet font size (zoom) was correlated with their high-contrast visual acuity with toric correction (r = 0.434, p = 0.010). With best sphere correction, zoom was associated with reading speed (r = −0.450, p = 0.008) and working distance (r = 0.522, p = 0.002). Text zoom was also associated with horizontal (toric: r = 0.898, p < 0.001; sphere: r = 0.880, p < 0.001) and vertical scrolling (toric: r = 0.857, p < 0.001; sphere: r = 0.846, p < 0.001). There was a significant negative association between the selection of text contrast and zoom (toric: r = −0.417, p = 0.0141; sphere: r = −0.385, p = 0.025). Conclusion: Real-world task performance allows more robust assessment of visual function than standard visual metrics alone. Digital technology offers the opportunity to better understand the impact of different vision correction options on real-world task performance.
- Subjects :
- Adult
Visual acuity
genetic structures
Computer science
media_common.quotation_subject
Visual impairment
Visual Acuity
Astigmatism
Refraction, Ocular
Reading (process)
medicine
Humans
In patient
media_common
Lenses, Intraocular
Cross-Over Studies
Vision Tests
medicine.disease
eye diseases
Ophthalmology
Visual function
Optometry
medicine.symptom
Focus (optics)
Subjects
Details
- ISSN :
- 14440938
- Volume :
- 104
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Clinicalexperimental optometry
- Accession number :
- edsair.doi.dedup.....eeeb07d60aa3cb4d641afce52f5f8094