R R

What Is Melanosis Oculi?

Melanosis oculi is a congenital increase in melanocyte pigmentation within the uveal tract, sclera, or other intraocular structures of one eye. It often appears as slate gray or brown patches on the sclera and deeper pigment in the iris, choroid, or optic disc. Vision is usually normal, but the pigmented eye carries a higher lifetime risk of uveal melanoma and, in periocular variants, orbital or meningeal melanoma. The condition commonly occurs alongside nevus of Ota involving periocular skin. Lifelong follow up focuses on detecting any malignant change early.

Link to This Resource Page

Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.

To display this...

What Is Melanosis Oculi?

Melanosis oculi is a congenital increase in melanocyte pigmentation within the uveal tract, sclera, or other intraocular structures of one eye. It often appears as slate gray or brown patches on the sclera and deeper pigment in the iris, choroid, or optic disc. Vision is usually normal, but the pigmented eye carries a higher lifetime risk of uveal melanoma and, in periocular variants, orbital or meningeal melanoma. The condition commonly occurs alongside nevus of Ota involving periocular skin. Lifelong follow up focuses on detecting any malignant change early.

read more about melanosis oculi ...

Copy this HTML:

Copy HTML Copied!

Features and Associations of Melanosis Oculi

Melanosis oculi typically presents at birth or early childhood and remains unilateral. The sclera can show patchy, bluish gray discoloration, while fundus examination reveals diffuse or mottled choroidal pigmentation. Periocular skin, especially in nevus of Ota, may show slate gray patches along the trigeminal distribution. The fellow eye and systemic examination are otherwise normal in most cases. Because melanocytes are increased in number, the background risk of transformation into melanoma is higher than in the general population.

Symptoms and Clinical Findings

Most patients are asymptomatic and seek care for cosmetic reasons or during routine exams. Visual acuity is generally preserved unless a secondary complication such as glaucoma or uveal melanoma develops. On slit lamp examination, the conjunctiva and sclera show flat, nonmobile pigmented patches that do not blanch with pressure. Gonioscopy and intraocular pressure checks are important, as angle pigmentation and secondary glaucoma can develop in some cases. Dilated fundus exam documents the extent and pattern of uveal pigment.

How Is Melanosis Oculi Diagnosed?

Diagnosis is clinical, based on characteristic pigmentation of the sclera and intraocular tissues in the absence of discrete mass lesions. The eye doctor evaluates both eyes, eyelid skin, and periocular regions for nevus of Ota. Fundus photography and, when needed, ultrasonography help distinguish diffuse pigment from focal uveal tumors. If intracranial extension is suspected in extensive oculodermal melanocytosis, neuroimaging may be obtained. Baseline documentation supports detection of subtle changes during follow up.

How Is Melanosis Oculi Managed?

There is no way to remove diffuse melanosis from intraocular tissues, so management centers on surveillance and complication prevention. Regular dilated exams look for new masses, subretinal fluid, or suspicious changes that could signal uveal melanoma. Intraocular pressure is monitored for secondary glaucoma, which is treated according to standard glaucoma guidelines. Periocular skin pigmentation may be addressed cosmetically with makeup or, in selected cases, laser therapy. Patients receive counseling about sun protection and the importance of keeping scheduled eye visits.

FAQs About Melanosis Oculi

Is melanosis oculi the same as a conjunctival nevus?

No, melanosis oculi is a diffuse increase in melanocytes within deeper ocular tissues, while a conjunctival nevus is a localized, usually superficial lesion. They have different appearances and risks.

Does melanosis oculi always involve the skin around the eye?

No, some patients have isolated intraocular melanosis without nevus of Ota. When skin is involved, the term oculodermal melanocytosis is often used.

Can melanosis oculi lead to blindness?

Most people maintain good vision, but complications such as uveal melanoma or secondary glaucoma can threaten sight. Regular monitoring helps detect and manage these problems early.

Can melanosis oculi be prevented or cured?

It is a congenital condition that cannot be prevented or fully reversed. Care focuses on lifelong observation and treating any secondary issues that arise.

References

EyeWiki. “Oculodermal melanocytosis (Nevus of Ota).” https://eyewiki.org/Oculodermal_melanocytosis?361414321744469†L101-L130?

StatPearls. “Nevus of Ota and Ito.” https://www.ncbi.nlm.nih.gov/books/NBK499927/?342555470795303†L101-L137?

DermNet New Zealand. “Naevus of Ota (oculodermal melanocytosis).” https://dermnetnz.org/topics/naevus-of-ota?742141432350107†L114-L166?

EyeRounds (University of Iowa). “Oculodermal melanocytosis (Nevus of Ota).” https://eyerounds.org/atlas/cases/64.htm?771624006604150†L47-L55?

WebMD. “Nevus of Ota: What Is It and How Is It Treated?” https://www.webmd.com/skin-problems-and-treatments/what-is-nevus-of-ota?818973111486736†L125-L152?