With VoiceOver—a gesture-based screen reader—you can use iPhone even if you can’t see the screen. VoiceOver gives audible descriptions of what’s on your screen—for example, hear the battery level, who’s calling, or what item your finger is on. You can also customize the VoiceOver speaking voice to suit your needs.
When you touch the screen or drag your finger over it, VoiceOver speaks the name of the item your finger is on, including icons and text. To interact with the item, such as a button or link, or to navigate to another item, Detect text around you and have it read out loud using Magnifier on iPhoneAccessibility features for vision on iPhone