The iOs is a type of OS that is commonly used in iPhones. An important version of this iOS is MAC X. This model is built-up with the night vision technology and it is used to increase the performance of the mobile. Though it has night vision technology in it, some settings should be adjusted in those devices to make the night vision active in the mobile phones.
To activate the night vision mode in OS x mobiles; just click the command button and then select options in it. Select control-8 to invert the screen colors of the mobiles. Other than this, the night vision mode can be activated just by activating the night vision apps in the mobiles.