Iwata Yo, Handa Tomoya
School of Allied Health Sciences, Kitasato University, Sagamihara, JPN.
Cureus. 2025 Apr 22;17(4):e82760. doi: 10.7759/cureus.82760. eCollection 2025 Apr.
To examine the effects of target clarity on monocular blur suppression while using simultaneous vision multifocal lenses through video simulation.
Twenty healthy adults (mean age 20.8±6.1 years) were presented with circular targets at three spatial frequencies (3, 6, and 18 cpd). Gaussian blur filter simulated full refractive correction (0 pixels of blur) and two levels of residual refractive error correction (10 pixels and 20 pixels, respectively). For each target condition, a 50% transparent image with the same spatial frequency was superimposed, with its blur gradually increasing by 0.1 pixels every 0.2 s. The time until participants detected additional blur compared to the initial state was measured and analyzed.
Participants perceived blur significantly earlier in the two levels of residual refractive error models (10 and 20 pixels of initial blur) compared to the full refractive correction model across all spatial frequencies (p < 0.017). Spatial frequency also influenced blur perception, with detection occurring significantly earlier at higher cpd values across initial blur conditions.
Residual refractive error appears to impair the function of monocular blur suppression, aggravating the perception of ghost images. Full refractive correction is therefore essential for effectively suppressing these unwanted visual artifacts.
通过视频模拟，研究目标清晰度对使用同步视多焦点镜片时单眼模糊抑制的影响。
向20名健康成年人（平均年龄20.8±6.1岁）呈现三种空间频率（3、6和18周/度）的圆形目标。高斯模糊滤镜模拟全屈光矫正（0像素模糊）和两种残余屈光不正矫正水平（分别为10像素和20像素）。对于每种目标条件，叠加一个具有相同空间频率的50%透明图像，其模糊度每0.2秒逐渐增加0.1像素。测量并分析参与者检测到与初始状态相比额外模糊所需的时间。
在所有空间频率下，与全屈光矫正模型相比，参与者在两种残余屈光不正模型（初始模糊为10像素和20像素）中更早察觉到模糊（p < 0.017）。空间频率也影响模糊感知，在所有初始模糊条件下，较高周/度值时检测到模糊的时间明显更早。
残余屈光不正似乎会损害单眼模糊抑制功能，加重重影的感知。因此，全屈光矫正对于有效抑制这些不必要的视觉假象至关重要。
