Another is to look at the image cross-eyed and then shift back to normal vision.

第二种方法是斜着看图，然后转回到正常视角。

youdao

If it were a real phenomenon, versions of it should be widespread, the way normal vision is.

如果读心术真实存在的话，它的版本应该更广泛，方式更正常。

youdao

Instead I have exercised my eyes and after a few weeks of exercising my eyes, they have returned back to normal vision.

相反，我一直做眼操，数周之后，我的眼睛就恢复以往的视力水平了。

youdao

And it can lead to headaches and blurred vision. "You're taking that normal relationship which has been coupled in the brain for years.

VOA: standard.2010.02.21

Normal vision is based on more than one hundred million receptors in each eye that process light, say experts.

WSJ: FDA Approves Bionic Eye

It works like bifocals in that you look up to see the display so your normal vision below is never blocked.

WSJ: The Weekend Interview With Sebastian Thrun: What's Next for Silicon Valley?

Although the resulting vision is not the same as when these patients had normal vision, investigators involved in the clinical trial of the Argus II are eager about the approval.

ENGADGET: FDA clears Argus II 'bionic eye' for sale in the US (video)