S10 RedEyes is a sophisticated red-eye removal program that also functions as a general purpose photo editor. It features a circular/elliptical eye selection tool - not rectangular as in other programs - and it smoothly removes redness, with pixel blending along the perimiter (anti-aliasing).

Eye brightness, pupil brightness, and eye color are all adjustable. For severe cases where the flash has entirely wiped out the structure of the eye, a "replacement eye" option is available.

General photo editing capabilities include rotating, resizing, cropping, adjusting brightness, and correcting tilt. A navigation toolbar makes it easy to cycle through all photos in a folder. Also includes printing capabilility with instant preview.

S10 RedEyes is digitally signed, compact (262KB), easy to use, and free.

Circular/elliptical eye selection tool - In other programs you typically have to use a rectangle to select the red eye, but S10 RedEyes uses a much more natural, circular selection area that you can flatten as appropriate to match the shape of the red eye using the -/+ keys (both during and after selection).

Simply open a photo in S10 RedEyes, click a red eye (or right in between the eyes if both are red), and the "Fix Red Eyes" window pops up (see figure on right) with a zoomed-in view and controls for further zooming in/out as needed. Then just click/hold/drag the mouse to select the exact area you want to correct.

Smooth redness removal with pixel blending - S10 RedEyes performs smooth pixel blending (anti-aliasing) along the perimiter of the selection area, whereas other programs often leave a distinct contrast difference and/or jagged border between the corrected eye and its surrounding area.

The redness is automatically removed from the eye as soon as you finalize your selection area (see figure on right). A small preview area is also provided where you can instantly see the effects of your changes in a zoom-out view.

Adjustable eye brightness, pupil brightness, and eye color - In addition to eliminating redness, S10 RedEyes also lets you fine-tune brightness and color:
- Brightness is adjustable in two different ways - you can change the brightness of the center of the eye (the pupil) independently of the brightness of the whole eye (the entire selection area).
- The color of the eye will initially be a gray tone after removing the redness, but you can adjust this by specifying blue, brown, or green.
In the figure to the right, a natural look has been restored by darkening the pupil and selecting blue eye color.

Optional replacement eye - In severe cases where the flash has entirely wiped out the structure of the eye or left very uneven brigntess levels, it may be very difficult to restore a natural appearance - even with the tools described above that adjust eye and pupil brightness separately. S10 RedEyes offers a solution to this problem via its "Use Replacement Eye" option which inserts a normal-looking eye into the selected area, while still allowing you to fine-tune brightness and color.

General photo editing features - S10 RedEyes also supports all of the most commonly needed general photo-editing functions:

- Rotating, adjusting brightness, and correcting tilt can all be done with one-click ease via the toolbar buttons at the top right of the window.
- To crop a photo, first switch to "Crop Mode" via the toolbar and then just click/drag to draw a selection rectangle around the desired area of the photo. Both locked-aspect-ratio cropping (left mouse button) and free-form cropping (right mouse button) are supported.
- The size of the photo is displayed in the status bar, along with a button that brings up the Resize window which offers one-click access to a set of pre-defined sizes, as well as the ability to specify either a percentage or the exact width and height (with or without locked aspect ratio). For maximum possible quality, the resizing algorithm doesn't just resample as other programs often do; it derives the color of each pixel in the new image by calculating the exact average color of the corresponding pixel area (including partial pixels) in the existing image. When enlarging an image - which should normally be avoided because it reduces sharpness - you have the option of smoothing out pixel lines. Note that the program has two display modes - "Fit In Window" and "Actual Size"; when resizing, you may want to switch to Actual Size to be able to see the result.

Navigation toolbar - The controls at the bottom left of the window (First, Prev, Next, Last) make it easy to navigate through all images in a folder (jpg/gif/bmp/png formats). In addition, at the top left of the window the Back and Forward buttons allow you to easily navigate through your trail of accessed images, similar to standard browser functionality.

Photo printing - S10 RedEyes makes it easy to print photos, with a print preview window that lets you see exactly how the layout is affected as you change paper size, paper orientation, photo size, border width, number of copies, or the options to outline/center.

File formats - In addition to the standard JPEG photo file format, S10 RedEyes can also handle images of type GIF, BMP, and PNG. When saving in the JPEG format, the program will by default use a JPEG quality factor of 75, 82, or 90; whichever most closely matches the original image. Use the "Save/Quality..." option in the File menu if you want to use a specific JPEG quality factor. When saving in the GIF format (8-bit, palette-based), it will create a new palette with the 256 most used colors in the image; it will not resort to "dithering" algorithms (which tend to produce poor quality images) unless the image uses over 10000 colors. GIF transparency is maintained whenever possible.

Disclaimers - This software is provided "as is" and without warranties of any kind. No official support is provided. In no event shall S10 Software or the author be held liable for any damages whatsoever arising from the use or inability to use the software. S10 Software is not obligated to provide maintenance releases or updates for the software.