Rosenfield M, Abraham-Cohen J A
State University of New York, College of Optometry, New York 10010, USA.
Optom Vis Sci. 1999 May;76(5):303-7. doi: 10.1097/00006324-199905000-00018.
This study compared the ability of myopes and emmetropes to detect subjectively the presence of retinal defocus.
Subjects (12 myopes, 12 emmetropes) were cyclopleged and monocularly viewed a bipartite target through an appropriate near addition lens via a 2-mm artificial pupil. One-half of the target remained fixed while the other half was alternatively moved forward or backward until subjects first reported a difference in clarity between the two halves of the target.
The mean blur threshold for the emmetropes and myopes was +/-0.11 and +/-0.19 D, respectively (p = 0.0001).
These results demonstrate that myopes are less sensitive to the presence of blur, and may at least partially explain why previous reports have demonstrated a larger lag of accommodation in this refractive group. Additionally, the hyperopic retinal defocus resulting from the increased accommodative error may play a significant role in myopia development and progression.
本研究比较了近视者和正视者主观检测视网膜离焦的能力。
受试者（12名近视者、12名正视者）使用睫状肌麻痹剂后，通过一个2毫米的人工瞳孔，经适当的近用附加透镜单眼观察一个二分目标。目标的一半保持固定，而另一半交替向前或向后移动，直到受试者首次报告目标两半之间清晰度有差异。
正视者和近视者的平均模糊阈值分别为+/-0.11D和+/-0.19D（p = 0.0001）。
这些结果表明，近视者对模糊的存在不太敏感，这可能至少部分解释了为什么先前的报告显示该屈光组的调节滞后更大。此外，由调节误差增加导致的远视性视网膜离焦可能在近视的发生和发展中起重要作用。
