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Ophthalmology – Choroidal Rupture
Choroidal rupture is a traumatic break involving the choroid, Bruch’s membrane, and the retinal pigment epithelium (RPE), typically resulting from blunt ocular trauma. The injury occurs when the globe is rapidly compressed and then expands, causing mechanical stress that exceeds the tensile strength of Bruch’s membrane. While the sclera and retina are relatively elastic and resistant, Bruch’s membrane is more brittle and prone to tearing.
Epidemiologically, blunt ocular trauma is the most common type of eye injury, and approximately 5–10% of such cases result in choroidal rupture. Most patients have a single rupture, although multiple ruptures can occur in up to 25% of cases. The majority are located temporal to the optic disc, and about two-thirds involve the macula. Although rare in the general population, choroidal rupture is more frequently encountered in individuals with a history of ocular trauma.
The primary risk factor is blunt trauma to the eye, often occurring in younger individuals, particularly males. Patients with pre-existing abnormalities of Bruch’s membrane, such as angioid streaks, are more susceptible and may develop ruptures even after relatively minor trauma. Preventive measures include the use of protective eyewear, especially during contact sports or high-risk activities.
Pathophysiologically, trauma causes rupture of Bruch’s membrane and damage to the underlying choriocapillaris, leading to subretinal or sub-RPE hemorrhage. In the acute phase, hemorrhage and retinal edema may obscure the rupture. As the hemorrhage resolves, the rupture becomes visible as a characteristic white, curvilinear streak, often concentric to the optic disc. Choroidal ruptures are classified as direct (at the site of impact) or indirect (away from the impact site, typically in the posterior pole).
Clinically, patients usually present with a history of blunt trauma followed by decreased vision, central or paracentral scotoma, or visual distortion. On examination, findings may include subretinal hemorrhage and, later, the classic crescent-shaped streak. Additional traumatic findings such as retinal tears, macular holes, or retinal detachment may also be present and should be actively sought.
Diagnosis is primarily clinical but supported by imaging. Fluorescein angiography typically shows an early hypofluorescent streak followed by late hyperfluorescence. Indocyanine green angiography can help identify ruptures obscured by hemorrhage. Optical imaging and B-scan ultrasonography may assist in evaluating associated complications. CT imaging may be required if there is concern for orbital fractures or intraocular foreign bodies.
There is no direct treatment for the rupture itself. Management focuses on identifying and treating associated injuries and complications. Inflammation may be treated with topical steroids and cycloplegics. A key long-term complication is choroidal neovascularization (CNV), which may develop months to years later and is typically treated with anti-VEGF therapy.
Prognosis depends largely on the location of the rupture. Subfoveal ruptures are associated with poor visual outcomes, whereas extrafoveal ruptures often preserve good vision unless complicated by CNV. Many patients do not achieve visual acuity better than 20/40, particularly if the macula is involved.
Complications include CNV (the most common late complication), retinal detachment, and persistent visual field defects. Patients should be monitored closely over time and educated to use tools such as an Amsler grid to detect early visual changes suggestive of CNV development.
Ophthalmology – Choroidal Rupture
Choroidal rupture is a traumatic break involving the choroid, Bruch’s membrane, and the retinal pigment epithelium (RPE), typically resulting from blunt ocular trauma. The injury occurs when the globe is rapidly compressed and then expands, causing mechanical stress that exceeds the tensile strength of Bruch’s membrane. While the sclera and retina are relatively elastic and resistant, Bruch’s membrane is more brittle and prone to tearing.
Epidemiologically, blunt ocular trauma is the most common type of eye injury, and approximately 5–10% of such cases result in choroidal rupture. Most patients have a single rupture, although multiple ruptures can occur in up to 25% of cases. The majority are located temporal to the optic disc, and about two-thirds involve the macula. Although rare in the general population, choroidal rupture is more frequently encountered in individuals with a history of ocular trauma.
The primary risk factor is blunt trauma to the eye, often occurring in younger individuals, particularly males. Patients with pre-existing abnormalities of Bruch’s membrane, such as angioid streaks, are more susceptible and may develop ruptures even after relatively minor trauma. Preventive measures include the use of protective eyewear, especially during contact sports or high-risk activities.
Pathophysiologically, trauma causes rupture of Bruch’s membrane and damage to the underlying choriocapillaris, leading to subretinal or sub-RPE hemorrhage. In the acute phase, hemorrhage and retinal edema may obscure the rupture. As the hemorrhage resolves, the rupture becomes visible as a characteristic white, curvilinear streak, often concentric to the optic disc. Choroidal ruptures are classified as direct (at the site of impact) or indirect (away from the impact site, typically in the posterior pole).
Clinically, patients usually present with a history of blunt trauma followed by decreased vision, central or paracentral scotoma, or visual distortion. On examination, findings may include subretinal hemorrhage and, later, the classic crescent-shaped streak. Additional traumatic findings such as retinal tears, macular holes, or retinal detachment may also be present and should be actively sought.
Diagnosis is primarily clinical but supported by imaging. Fluorescein angiography typically shows an early hypofluorescent streak followed by late hyperfluorescence. Indocyanine green angiography can help identify ruptures obscured by hemorrhage. Optical imaging and B-scan ultrasonography may assist in evaluating associated complications. CT imaging may be required if there is concern for orbital fractures or intraocular foreign bodies.
There is no direct treatment for the rupture itself. Management focuses on identifying and treating associated injuries and complications. Inflammation may be treated with topical steroids and cycloplegics. A key long-term complication is choroidal neovascularization (CNV), which may develop months to years later and is typically treated with anti-VEGF therapy.
Prognosis depends largely on the location of the rupture. Subfoveal ruptures are associated with poor visual outcomes, whereas extrafoveal ruptures often preserve good vision unless complicated by CNV. Many patients do not achieve visual acuity better than 20/40, particularly if the macula is involved.
Complications include CNV (the most common late complication), retinal detachment, and persistent visual field defects. Patients should be monitored closely over time and educated to use tools such as an Amsler grid to detect early visual changes suggestive of CNV development.
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