Horner's syndrome is characterized by an interruption of the oculosympathetic nerve pathway somewhere between its origin in the hypothalamus and the eye. The classic clinical findings associated with Horner's syndrome are ptosis, pupillary miosis and facial anhidrosis. Other findings may include apparent enophthalmos, increased amplitude of accommodation, heterochromia of the irides (if it occurs before age two), paradoxical contralateral eyelid retraction, transient decrease in intraocular pressure and changes in tear viscosity.
And, apparently, Sophia has it. It's not as bad as it sounds. Basically, for Sophia, it's just a difference in pupil size and speed of dilation of the eyes. If you look carefully at the photo below, you can see that her left pupil is larger than the right.
The right pupil is experiencing pupillary miosis (see paragraph above). According to her eye doctor, she has Third Order or Third Neuron Horner's Syndrome, which is the mildest version. He feels that it is probably the result of some trauma from her early delivery and being in the hospital so long. He said he thinks she has a postganglionic lesion. Again, sounds worse than it is. That's just some stretching of that particular nerve in her neck that has caused the right eye to dilate slower and not as much. Thus far, Sophia is not exhibiting ptosis (droopy eyelid) or facial anhidrosis (reduced sweating on that side of her face). It is likely, though that she will have heterochromia of the irides (her eyes will end up being two different colors). Again, Dr. Henry thinks this is 'normal' for Sophia, and is not overly concerned. She will be rechecked in six months to make sure there is no change in the condition, and that her eyes are growing at the same rate. If it causes her eyes to grow at different pace, she will get glasses. However, it seems likely that she will have glasses at some point, anyway, given my history and the fact that she's already significantly more near sighted (less farsighted) than most babies her age!
This is just one more thing that makes our sweet baby girl unique! I'm praying that it will stay this way and not have any adverse impact on her visual development. For right now, we can just wait to see if one of those pretty blue eyes turns green!