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Impact of dual-focus soft contact lens wear on near work-induced transient myopia.
- Source :
-
Clinical & Experimental Optometry . Apr2023, Vol. 106 Issue 3, p296-302. 7p. - Publication Year :
- 2023
-
Abstract
- Dual-focus soft contact lenses are effective in slowing myopia progression; however, their influence on near work-induced transient myopia (NITM) remains unknown. When performing a 5-min near task at 20 cm, we observed that dual-focus soft contact lens wear induced greater lags of accommodation and a lower initial NITM than single-vision soft contact lenses, which provides relevant information for better understanding the impact of using this optical design on the accommodative function. NITM has been proposed as a myogenic factor, although it is a matter of debate by the scientific community. The main objective of this study was to assess the short-term effect of wearing dual-focus soft contact lenses for myopia control on the steady-state accommodative response and NITM. Twenty-four young myope adults wore, on two different days, dual-focus and single-vision soft contact lenses, while the accommodative response was dynamically measured with an open-field autorefractor during the execution of the NITM task. The shift and the time required to recover baseline levels in the refractive state after performing the 5-min near task (20 cm) were the main dependent variables. We found a lower magnitude of accommodation during the execution of the near task with the dual-focus in comparison to the single-vision soft contact lenses (p < 0.001). There was a lower initial NITM with the dual-focus when compared to the single-vision lenses (corrected p-value = 0.003, Cohen's d = 0.68), but no statistically significant differences were observed for decay duration (p = 0.984). Dual-focus soft contact lens wear causes a reduced accommodative response during a near task, and an initial small myopic shift at distance after a 5-min period of near viewing. The current findings may help to understand the mechanisms involved in myopia control with this optical strategy. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SOFT contact lenses
*MYOPIA
*STEADY-state responses
*OPTICAL control
Subjects
Details
- Language :
- English
- ISSN :
- 08164622
- Volume :
- 106
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Clinical & Experimental Optometry
- Publication Type :
- Academic Journal
- Accession number :
- 162840279
- Full Text :
- https://doi.org/10.1080/08164622.2022.2029684