Although<unk>  can develop at any age, it primarily afflicts children and young adults. There is a bimodal distribution with one peak in the second decade and another peak in the third or fourth decade. In the United States the proportion of patients with<unk>  is estimated to be 4-8% of<unk>  cases in referral centers. The National Institutes of Health reports a higher percentage (15%), which may indicate improved awareness or the nature of the<unk>  referral clinic. In the pediatric population,<unk>  can account for up to 25% of<unk>  cases.
Intermediate uveitis
Neurotrophic keratitis
Nummular keratitis
Fuchs heterochromic iridocyclitis
Interstitial keratitis
Diffuse lamellar keratitis
Infiltrative ophthalmopathy
Peripheral ulcerative keratitis