Add more light. Tap 
to turn the flashlight on or off.
Turn your iPod touch into a magnifying glass to zoom in on objects near you.
Set up Magnifier. Go to Settings > General > Accessibility > Magnifier, then turn on Magnifier. This adds Magnifier to Accessibility Shortcut.
Start Magnifier. Triple-click the Home button. If you have multiple accessibility shortcuts, tap Magnifier.
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.
Freeze the frame. Tap 
. To adjust the magnification, drag the Zoom Level slider. o save the image, touch and hold the image, then tap Save Image. To unfreeze the frame, tap again.
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.
Turn off Magnifier. Click the Home button.