The ophthalmic division of the trigeminal nerve is the smallest of the three divisions, providing purely sensory innervation to the forehead, upper face, cornea, and anterior cranial structures. Its corneal branch via the nasociliary nerve makes it the afferent limb of the corneal blink reflex, the most sensitive test of V1 function. Herpes zoster ophthalmicus affects V1, producing shingles vesicles on the forehead and eyelid with potential corneal involvement.
| Origin | Trigeminal ganglion (Gasserian ganglion) |
|---|---|
| Course | Passes through the lateral cavernous sinus wall, enters the orbit through the superior orbital fissure, and divides into the frontal (supraorbital and supratrochlear), lacrimal, and nasociliary branches |
| Motor |
|
| Sensory |
|
Herpes zoster ophthalmicus from V1 zoster reactivation affects up to 20 percent of all herpes zoster cases and produces potentially sight-threatening keratitis when the nasociliary branch (supplying the cornea) is involved, indicated by the Hutchinson sign of vesicles on the tip of the nose. Urgent antiviral therapy is required for ophthalmic zoster to reduce the risk of post-herpetic neuralgia and ocular complications.
V1 dermatomal shingles producing forehead vesicles with corneal involvement risk when the nasociliary branch is affected (Hutchinson sign), managed with urgent antivirals.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
