But focusing on close objects involves contraction of muscles controlling the shape of the eye's lens. And one possibility is that "this constant contraction may stretch the eyeball.

目前没有研究显示为什么大量阅读会导致这一结果，但是由于长时间聚焦近处的物体需要眼部肌肉持续收缩以保证视网膜保持需要的形状，因此这种眼肌的持续收缩状态可能会使眼球受到拉伸，长期如此，其原有形状可能会被永久地改变，从而导致近视产生。

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Soon after focusing on writing full-time, he realized his fiction suffered because he was out of shape.

在专心全职写作不久，他意识到他小说写不好是因为他身体不健康。

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Focusing on the high error and time consuming of the algorithms for shape from shading (SFS), a fast viscosity solution algorithm of perspective SFS (PSFS-FVS) is proposed.

针对传统的从明暗恢复形状(SFS)算法存在误差大、耗时长的问题，提出了一种SFS的快速黏性解算法(PSFS - FVS)。

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Parts will be supplied by vendors, but the ideal shape will have to be discovered by each CIO after they stop focusing on technology and start understanding the business they serve.

FORBES: The Coming Crisis of IT Management