**1. Introduction**

The World Health Organization classifies the blindness as a severe disability that corresponds with its category VI, whereas the category VII is considered to be a maximum severity [1]. Visual impairment and blindness are problems which can affect significantly in functioning for daily living activities, to live with independent life, indoor and outdoor movement, social inclusion & participation, communication, employment, and finally impacted on the quality of life [2–4]. Such impacts extend much beyond individuals who have the problem, but also to the family, to the society as well as the community to a large extent. In addition, the present COVID-19 pandemic and its preventive measures pose a new challenge in terms of performing the daily living tasks among visually disabled people as well as to receive their daily supports for living [5]. Globally, around 253 million people who have some form of visual loss are facing such challenges and difficulties in their everyday life [6]. These people need to live with independent lives, and cope these daily challenges and difficulties resulting from visual impairment whether it is at home, workplaces, schools, or market. Fortunately, the continued advance in assistive technology has provided a new platform and opportunities for people living with visual impairment to overcome many of these barriers and challenges that they encounter in their everyday lives. Digital assistive technology is one of them that has grown rapidly in the past few years which helps in solving these challenges.

Many smart digital assistive technologies based on electronic information, communication technology for visual impairment have been gaining a lot of importance across the world in recent times [7, 8]. Such smart assistive technologies have many accessible features and accessible applications for persons with disabilities, including low vision and blindness. For instance, the technology of mainstream assistive devices, e.g., mobile phones and tablets, has evolved substantially over the years from simple basic phone, such as NOKIA 8110, to high end and touch screen smartphones or tablets or I-pad with operating system of IOS, or Android platform (**Figure 1**). With ongoing advance in smartphone technologies, it is becoming even more feasible for the person with visual impairment to rely on mobile technology in understanding their immediate surrounding, and to access huge amounts information that can improve their level of independent functioning, movement, social inclusion, participation, educational activities, and finally helps in improving the

**Figure 1.** *Simple phone, smartphone, and tablet (left to right).*

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

**Figure 2.** *Braille book, Braille slate and stylus, Braille type writer (left to right).*

quality of life [9]. Now, smartphones have become a part of our everyday life and replacing gradually the traditional assistive devices (such as Braille materials **Figure 2**) in doing various routine tasks and bringing the solutions [10, 11].
