Optical illusions are all the rage, some drawings contain tricks that can indicate your type of personality.
视错觉在当下非常流行，一些图片包含了某些可以显示你个性的方面。
ISO 10110 optics and optical instruments-preparation of drawings for optical elements and systems, international standard.
ISO 10110光学及光学仪器-光学元件和系统图形的制备，国际标准。
ISO 10110 optics and optical instruments-preparation of drawings for optical elements and systems, international standard.
ISO 10110光学及光学仪器-光学元件和系统图形的制备，国际标准。
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