If the ocular image disparity is abnormal(e.g., in anisometropic prescriptions)the stereo effect will be greater than what it should be. The perceptual image will be distorted , a condition called aniseikonia

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Presentational training method of image movement adopts psychological principles, utilize iterative memory and image to stimulate the central nerve system of the cerebra, and prompt the process of thinking. It can help the students to understand and master the mechanism of the action so as to make the ocular presentation and kinesthesia nerves connect with each other.

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In the paper, a brand new measuring proposal which developed the foundation of conversional grating measurement has been introduced. It applies the electronic ocular (which essential element is CMOS image sensor) to the length measurement and uses the digital image processing technique subdivide the grating image in order to improve the distinguishability and accuracy of the system, and make the data processing, saving and transmission much more easier in the meantime.

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ocular lens：目鏡

實(shí)像位于目鏡(Ocular lens)的物方焦點(diǎn)F2上,或者在很靠近F2的位置上. 再經(jīng)目鏡放大為虛像(Virtual image)后供眼睛觀察. 虛像的位置取決于F2和實(shí)像之間的距離,可以在無(wú)限遠(yuǎn)處(當(dāng)實(shí)像位于F2上時(shí)),也可以在觀察者的明視距離處(當(dāng)實(shí)像在焦點(diǎn)F2與目鏡之間).

real image：實(shí)像

所以,它經(jīng)物鏡以后,必然形成一個(gè)倒立的放大的實(shí)像(Real image). 實(shí)像位于目鏡(Ocular lens)的物方焦點(diǎn)F2上,或者在很靠近F2的位置上. 再經(jīng)目鏡放大為虛像(Virtual image)后供眼睛觀察. 虛像的位置取決于F2和實(shí)像之間的距離,