Figure 3 - available via license: Creative Commons Attribution-NonCommercial 4.0 International
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Diagrams J(20), J(35), J(50) and J(60). Colored cell: diopter is zero or negative, it may not be prescribed for hyperopia. Blank cell: diopter is positive, it may be prescribed for hyperopia.
Source publication
Purpose:
The objective of this paper was to compare the symptoms of asthenopia in patients at different levels of hyperopia and corrected for different accommodative efforts.
Methods:
This study is an experimental design and quantitative approach. Sixty-nine hyperopic patients aged between 15 and 40 were selected. Individuals with a diagnosis of a...
Similar publications
Objective:
To assess asthenopia prevalence and associated factors in schoolchildren aged 6-16.
Methods:
This was a cross-sectional study of all children attending the first to eighth grades at two public schools in the urban region of a medium-sized town in Southern Brazil between April and December 2012. A questionnaire on socioeconomic and cul...
Citations
... Overall, asthenopia research in adults and children indicated correlations of eye strain with age, refractive error, and insufficient accommodation [20][21][22]-a convex lens, however, was shown to not only help accommodation, but also to support orthoptic exercises for near distance tasks [23,24] and therefore was able to reduce eye strain [25,26]. Similarly, as shortwavelength light (380-420nm) is a critical factor in inducing asthenopia [27][28][29], a lens surface coated to block these wavelengths can decrease eye fatigue, coupled even with increases in visual performance and sleep quality [30,31]. ...
The steady, world-wide increase in myopia prevalence in children over the past decades has raised concerns. As an early intervention for axial-length-related myopia, correcting lenses have been developed (such as Defocus Incorporated Multiple Segment (DIMS) lenses), which have been shown to be effective in slowing myopia progression. Beyond this direct effect, however, it is not known whether such lenses also affect other aspects important to the wearer, such as eye fatigue, and how such effects may differ across age, as these lenses so far are typically only tested with adolescents. In the present work, we therefore investigated perceived fatigue levels according to lens type (normal vs DIMS) and age (adolescents vs adults) in a demanding visual search task ("Finding Wally") at two difficulty levels (easy vs difficult). Whereas age and difficulty did not result in significant differences in eye fatigue, we found a clear reduction of fatigue levels in both age groups when wearing the correcting lenses. Hence, the additional accommodation of these lens types may result in less strain in a task requiring sustained eye movements at near viewing distances.
