This is a laser baby tutorial for Gimp users. Gimp is an open source image editing program similar to Photoshop, that is free to download and use. You can get a copy here.
http://www.gimp.org/downloads/
Here are the steps written out.
Create a new layer.
Choose the Free Select tool.
Draw a laser shape for the first eye with the free select tool.
Go to edit - fill with BG color (make sure it is white)
Draw a second laser shape and fill with white
Select - none
Right click on the layer and choose "Alpha to selection"
Create a new layer
Go to the select menu and choose grow. Input 3px and hit okay
Choose the color of your laser as the foreground color
Go to edit and fill with FG color
Select - none
Go to filter - blur - gaussian blur
Input 45 px for horizontal and vertical
Move the blurred layer behind the white layer