However, finding the target area (especially with eye optics) and imaging it is easier due to special lenses and large LCD of the handset.

然而，找到目标区(特别是利用光学仪器)并成像就要靠手柄的特殊透镜和大型的液晶显示屏了。

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And optics require high-precision lenses with tight tolerance: Light is not a forgiving medium – think how even a slight ripple is noticeable in a glass.

和光学要求高精度镜头公差：光不是一个宽容的媒体 - 想怎么连一个微小的波动是明显的，在一个玻璃。

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Ophthalmic optics - Contact lenses - Part 1: Vocabulary, classification system and recommendations for labelling specifications; Amendment 1.

眼科光学。隐形眼镜。第1部分：规范标注用词汇、分类系统和推荐规程。修改件1。

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Medieval scholars were particularly fascinated by the science of optics and invented eye glasses partly as a result of their studies using lenses to determine the nature of light and the physics of sight.

FORBES: Connect

Scholars studying works on optics by Greek and Arabic scientists did experiments on the nature of light using lenses and invented eye glasses in the process.

FORBES: What Are Examples of Things in the "Common Knowledge" about History That Historians Almost Universally Consider Incorrect?

The small size of the LED light chip allows another advantage arising from the physics of optics: Engineers can employ collaterally small lenses making it possible to efficiently extract, direct and focus the lumens, achieving useful illumination with far fewer lumens--and far less energy--wasted.

FORBES: The LED Illumination Revolution