![]() ![]() ![]() ![]() We hypothesized that myopia may affect peripheral contrast sensitivity functions. During most indoor activities, peripheral vision is filled with high contrast, well-focused images from the same focal plane. From the perspective of environmental visual experience, it is thought that visual inputs to the retina associated with indoor activities such as reading, writing and use of electronic devices contain much less out-of-focus signals compared to those of variable focal planes in outdoor activities ( Flitcroft, 2012 Muriel et al., 2013). Studies on how emmetropization is tuned to particular spatial frequencies are of interest because visual images on the retina are composed of different spatial frequencies, which may, in turn, regulate eye growth during emmetropization ( Smith et al., 2005). There are very few studies on the contrast sensitivity function to better understand the real-world influence of spatial vision on myopia, and its effects on perceptual response to peripheral defocus (blur). Many studies highlight how optical factors impact structural changes related to the peripheral retina. As such, there is good consensus that both central and peripheral visual signals can interfere with the emmetropization mechanism ( Liu and Wildsoet, 2011). Over the last two decades, animal research on peripheral defocus has generated important insights on its effects in regulating eye growth related to myopia development ( Smith et al., 2007). ![]() Myopia has long been a serious public health and economic concern affecting a significant proportion of the population worldwide ( Lam et al., 2011). ![]()
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