**Table 1.**

*Accessible built-in features of smartphones.*

*Smartphones for Vision Rehabilitation: Accessible Features and Apps, Opportunity… DOI: http://dx.doi.org/10.5772/intechopen.97703*


#### **Figure 4.**

*Built-in features in Android operating system.*


#### **Figure 5.**

*Built-in features in iOS operating system.*

underneath the finger. Similarly, VoiceOver provides voice feedback aloud what appear on the smartphones'screen, so iOS operating smartphone can be used without the need of visual function. A visually disabled individual can slide around on the screen with finger until the desired icons is located.

This feature provides unwavering support to perform activities of daily living, communication, social interaction, for a severe visually impaired or blind users,

where human-vision smartphone interaction is impossible or difficult. For a person with a low vision, the zoom magnification feature helps to magnify the entire screen to the required level of individual's choice. Invert colors allows to change the white text on a black background, and vice versa or blue text on a yellow background A study on iPhone accessibility features in visually impaired population shows that the Zoom Magnification and Large Text were the most common use features among people with visual impairment [15]. This study reported that many participants were interested to use other accessibility features if they are familiar and trained on how to use such accessible features of a smartphones.
