A virus has been isolated from the corneal epithelium of a patient with superficial punctate keratitis. This virus has been identified as varicella-zoster. The patient's serum had a low titer of neutralizing antibodies to varicella-zoster virus. The significance of this finding is uncertain, but possible mechanisms involved in the pathogenesis of this condition are discussed.
Lemp MA, Chambers RW, Lundy J. Viral Isolate in Superficial Punctate Keratitis. Arch Ophthalmol. 1974;91(1):8-10. doi:10.1001/archopht.1974.03900060012003