OCULAR COMPLICATIONS OF VZV
*Todd P. Margolis, F.I. Proctor Foundation and the Department of
Ophthalmology, UCSF, San Francisco, California, USA
VZV causes a wide spectrum of ocular disease. Primary
infection with VZV, or chickenpox, may be associated with a vesicular
rash of the lids and/or mild conjunctivitis. Vision threatening
complications are rare. In contrast, recrudescent VZV affecting
the first division of the fifth cranial nerve (HZO), commonly causes
serious sight threatening ocular disease. HZO can affect all ocular
and adnexal structures, causing a variety of conditions including
conjunctivitis, epithelial and stromal keratitis, scleritis, anterior
and posterior uveitis, cranial nerve palsies, neurotropic ulceration,
mucous plaque keratopathy, lid scarring and post herpetic neuralgia.
HZO sine herpete is being recognized with increased frequency as
are diagnostic chronic and persistent forms of HZO, especially in
immunosuppressed patients. HZO is typically a much more devastating
disease than ophthalmic HSV. Furthermore, management of the ocular
complications of HZO can go on for years. The early use of systemic
antivirals appears to reduce the anterior segment complications
of this disease. Topicals steroids are used for inflammatory complications
that are signt threatening but should not be used routinely. Most
mild to moderate ocular inflammation is self limited and does not
require topical steroids. The biggest single problem with the use
of topical steroids in HZO is reducing and/or stopping their use.
They need to be tapered slowly, and many patients require topical
steroids for years, increasing the incidence of glaucoma and cataract.
Neurotrophic keratitis is a particularly devastating and difficult
to manage complication of HZO. Lubrication, elimination of toxic
topical agents and tarsorhaphy are the most effective approaches
to the management of neurotrophic keratitis. Topical steroid use
can worsen neurotrophic keratitis and may predispose these compromised
eyes to bacterial keratitis. VZV retinitis appears to be managed
best with a combination of intravenous acyclovir and intravitreal
foscarnet. Management of HZO in patients with HIV can be problematic.
Corresponding Author: Todd Margolis, M.D., Ph.D.,
Profesosr of Ophthalmology and Director, F.I. Proctor Foundation,
95 Kirkham, Box 0944, UCSF, San Francisco, CA 94143-0944, USA