A method of measuring the thickness and refractive index of thin transparency is introduced.

介绍了测量薄透明体厚度及折射率的一种方法。

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Objective To research the refraction and refractive changes of eyelid hemangioma in children.

目的探讨儿童眼睑血管瘤的屈光状态及其变化规律。

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Objective To investigate the relationship between oblique astigmatism and refractive cyclophoria.

目的为证实斜轴散光会引起光学性旋转隐斜。

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In the right circumstances, they can be created by manipulating the refractive indices of materials in the way that Dr Turberfield and Dr Denning are doing.

ECONOMIST: Microelectronics grows up