Magnify nearby objects with Magnifier on iPhone
Use your iPhone as a magnifying glass to zoom in on objects near you.
Set up Magnifier
Go to Settings
> General > Accessibility > Magnifier.Turn on Magnifier.
This adds Magnifier as an accessibility shortcut.
To automatically adjust the brightness of Magnifier based on ambient light settings, turn on Auto-Brightness.
Turn on and adjust Magnifier
Use accessibility shortcuts to turn on Magnifier.
Make any of the following adjustments:
Adjust the magnification level: Drag the Zoom Level slider.
Add more light: Tap
to turn the flashlight on or off.Lock the focus: Tap
. Tap again to unlock the focus.Apply color filters: Tap
. Tap the different color filters to preview their effects. To adjust the brightness and contrast, drag the sliders. To invert the colors, tap 
. To apply the selected filter and return to Magnifier screen, tap again.Freeze the frame: Tap
. To adjust the magnification, drag the Zoom Level slider. To save the image, touch and hold the image, then tap Save Image. To unfreeze the frame, tap again.
To turn off Magnifier, swipe up from the bottom edge of the screen (iPhone X and later) or press the Home button (other models).