Fix Red Eye on iPhone

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    Open the photo → Edit → tap the red-eye icon

    Open the photo in the Photos app. Tap Edit. In the top left, tap the red-eye correction icon (a circle with a diagonal line, or an eye symbol). Tap each red eye individually. The app detects and fixes the red colour automatically on each tap. Tap Done to save.

Fix Red Eye on Android

Open the photo in Google Photos → Edit (pencil icon) → Tools → Portrait Light or healing brush. For dedicated red eye: use Snapseed (free) → Tools → Healing → tap each red eye. Or use the free PicsArt app which has a dedicated red eye correction tool.

Fix Red Eye on Windows

Open the photo in the Photos app. Click Edit & Create → Edit. The Photos app has a basic red-eye removal tool in the Spot Fix area. Alternatively, download the free Paint.NET (a Windows photo editor) which has a Red Eye Removal effect under Effects → Photo.

Fix Red Eye on Mac

Open in Preview → Tools → Red Eye Correction. A red-eye removal cursor appears — click each red eye. Or open in Photos → Edit → the same red-eye tool as on iPhone.

Fix Red Eye Online (Free)

Fotor.com (free, no account needed): upload → Edit → Red Eye. Click each red eye. Download. Pixlr.com also has red eye correction tools available free.

Preventing red eyeRed eye occurs when flash light reflects off the retina. Prevention: enable the pre-flash or red-eye reduction mode on your camera (sends a brief burst before the main flash, causing pupils to contract). Take photos in better-lit environments so flash is not needed. Move the flash further from the lens (external flash) reduces the angle of reflection.

Frequently Asked Questions

Red eye severity depends on pupil dilation (larger pupils in dim light catch more flash), the angle between the flash and lens (closer = worse), and eye colour (lighter irises reflect more light). Children and people with lighter eye colours tend to get more severe red eye. Animals can appear with green, yellow or blue eye shine (eyeshine) in flash photos for the same reason.
Automatic red eye tools work by detecting red circles in the eye area. They can fail if the red area is small, oddly shaped, or if the eye is partially closed. For stubborn cases: in a more advanced editor (Photoshop, Affinity Photo, GIMP), manually select the red area and desaturate the red channel, or use the Hue/Saturation tool targeting reds to reduce saturation in just the selected area.