study published in the January issue of JAMA Ophthalmology examined the prevalence of sarcoidosis in patients diagnosed with idiopathic uveitis.

The study details:
The study reviewed data of uveitis patients referred to the Casey Eye Institute. Of these 179 idiopathic cases, further testing revealed that 11% of them actually had sarcoidosis.

Why is this important?
Because cardiac involvement in sarcoidosis can be life-threatening and it was found that 20% of the patients diagnosed with sarcoid in this study had episodes of ventricular tachycardia requiring implantable cardiac defibrillators. (via)