Medina A
Eye Research Institute of Retina Foundation, Boston, MA.
Acta Ophthalmol (Copenh). 1987 Oct;65(5):565-71. doi: 10.1111/j.1755-3768.1987.tb07041.x.
A mechanism called emmetropization appears to control the ocular focus over the years. Emmetropization could regulate the refractive media (dimensions of cornea, lens, and axial length), detecting the focus or refractive error of the eye at rest and initiating changes to reduce the refractive error; this concept suggests that a feedback loop is operational. A feedback mechanism for ocular refraction implies that correcting ametropia with lenses initiates a change in the refractive state of the eye. The long-term effect of corrective lenses on ocular refraction is investigated with a mathematical feedback model that can predict the extent and direction of this change. The results indicate that lenses worsen existing ametropia conditions. However, the use of appropriate lenses in early life can reduce and correct developing ametropia.
一种称为正视化的机制似乎多年来一直在控制着眼睛的聚焦。正视化可以调节屈光介质（角膜、晶状体的尺寸以及眼轴长度），检测眼睛静止时的焦点或屈光不正，并启动改变以减少屈光不正；这一概念表明存在一个运行中的反馈回路。眼睛屈光的反馈机制意味着用镜片矫正屈光不正会引发眼睛屈光状态的改变。使用一个能够预测这种变化的程度和方向的数学反馈模型，来研究矫正镜片对眼睛屈光的长期影响。结果表明，镜片会使现有的屈光不正情况恶化。然而，在生命早期使用合适的镜片可以减少并矫正正在发展的屈光不正。
