I missed the cut off time for Project 52 - catch light, because I was out of town helping a friend take care of her precious 2 week old borzoi puppies!
Catch lights are the reflected bit of light on the surface of the eye. These reflections help create a sense of the glossy, wet surface of the eye. They can also aid in creating the look of a solid round surface, instead of an empty black socket. You can see the tiny white highlight in this little puppy below!
A more obvious example would be my photo from last week - Galileo filling the frame. Do you see the bright stroke of a highlight along the top of his eye? Catch light!
Now, these borzoi puppies had only recently opened their eyes. At such a young age, they still can't see in any great detail. They also answer to no-one except their hungry tummies and their sleepy bodies, so finding catch light on an open puppy eye was mostly a waiting game! Much of the time, their little eyes were squeezed shut like this:
Get that camera out of my face, lady!!
The full gallery of borzoi puppy photos can be viewed here.