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What Is a Myopic Staphyloma?

A myopic staphyloma is an outpouching or localized bulge of the eye wall that occurs in pathologic myopia. The sclera thins and curves outward more steeply than the surrounding globe, usually in the posterior pole. This altered contour stretches the overlying retina and choroid and contributes to myopic maculopathy, including atrophy, foveoschisis, and choroidal neovascularization. The presence and shape of a staphyloma influence how images are focused on the retina and how vision changes over time. It is a hallmark of advanced high myopia.

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What Is a Myopic Staphyloma?

A myopic staphyloma is an outpouching or localized bulge of the eye wall that occurs in pathologic myopia. The sclera thins and curves outward more steeply than the surrounding globe, usually in the posterior pole. This altered contour stretches the overlying retina and choroid and contributes to myopic maculopathy, including atrophy, foveoschisis, and choroidal neovascularization. The presence and shape of a staphyloma influence how images are focused on the retina and how vision changes over time. It is a hallmark of advanced high myopia.

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Types and Anatomic Features

Posterior staphylomas are classified into patterns based on location, such as macular, peripapillary, or wide posterior forms. In each type, the scleral curvature becomes steeper in the affected zone, creating a bowl shaped excavation. The choroid and retinal pigment epithelium over the staphyloma are thinned and can show patchy or diffuse atrophy. Tilted discs, peripapillary atrophy, and lattice degeneration in the periphery are common findings in highly myopic eyes. Modern imaging helps map these structural changes in detail.

Clinical Presentation and Imaging Findings

People with myopic staphyloma almost always have high axial myopia and often report blurred central vision, distortion, or gradual decline in acuity. On fundus exam, the posterior pole can appear excavated with a gray or tessellated background and areas of chorioretinal atrophy. Lacquer cracks and pigment clumping may be seen in or near the macula. Optical coherence tomography reveals altered foveal contour, retinal thinning, foveoschisis, or subretinal fluid when neovascularization is present. Swept source OCT and wide field imaging show the full extent and shape of the staphyloma.

Diagnosis and Management

Diagnosis combines a history of high myopia with characteristic fundus and imaging findings. Axial length measurements document globe elongation and help stage risk. Management focuses on complications such as myopic choroidal neovascularization, which is usually treated with intravitreal anti VEGF injections. Vitreoretinal surgery can be considered for severe foveoschisis or macular holes related to staphyloma contour. Myopia control strategies in childhood aim to lower the chance of reaching extreme axial lengths that predispose to staphyloma.

Prognosis and Long-Term Care

The long term outlook varies widely and depends on how much macular structure is affected. Some patients retain useful central vision for many years with careful monitoring and timely treatment of CNV or tractional changes. Others develop dense macular atrophy and need low vision support for daily tasks. Lifelong follow up is recommended to watch for new choroidal neovascularization, progressive atrophy, and other myopic changes. Education on symptom monitoring and regular retinal exams is important for early detection of treatable events.

FAQs About Myopic Staphyloma

Is a myopic staphyloma the same as high myopia?

No, a staphyloma is a structural complication of high myopia that involves localized scleral outpouching, while high myopia refers to a strong refractive error and increased axial length overall.

Can a myopic staphyloma be reversed?

The anatomic bulge does not return to a normal shape, but some complications such as choroidal neovascularization or foveoschisis can be treated to improve or stabilize vision.

How is a staphyloma detected if my retina looks normal in a brief exam?

Advanced imaging such as OCT and wide field photography can reveal subtle contour changes that are not obvious on a quick ophthalmoscopic view.

Does every person with high myopia develop a staphyloma?

No, only a subset of highly myopic eyes develop staphylomas, but risk rises with greater axial length and age, so regular retinal evaluation is advised for high myopes.

References

EyeWiki (American Academy of Ophthalmology). ?Staphyloma.? https://eyewiki.org/Staphyloma

American Academy of Ophthalmology (AAO). ?What is staphyloma?? https://www.aao.org/eye-health/ask-ophthalmologist-q/staphyloma

National Library of Medicine (PMC). ?Understanding Posterior Staphyloma in Pathologic Myopia.? https://pmc.ncbi.nlm.nih.gov/articles/PMC10725704/

Europe PMC. ?Features of posterior staphylomas analyzed (Ohno-Matsui and colleagues).? https://europepmc.org/article/med/27557083

EyeWiki (American Academy of Ophthalmology). ?Pathologic Myopia (Myopic Degeneration).? https://eyewiki.org/Pathologic_Myopia_%28Myopic_Degeneration%29