Blunt trauma
 

The posterior pole contains white lines (exposed sclera) which are concentric to the optic nerve. The edges of the lines may be  hyperpigmented due to RPE hyperplasia. There may be retinal oedema or haemorrhage due to subretinal neovascular membrane.  There may be other associated signs such as macular hole. The peripheral retina may have chorioretinal atrophy due to retinal  detachment operation. In the presence of traumatic optic neuropathy, the disc is pale. Other sings Look for associated anterior segment trauma such as iridodialysis, ectopia lentis or sphincter paralysis.

Questions:

1. How does choroidal rupture occur?

Answer
The rupture occurs when the eye is compressed antero-posteriorly resulting in stretching along its horizontal axis and tearing. The rupture often involves the Bruch's membrane and sometimes the retinal pigment epithelium and the choriocapillaries. Choroidal haemorrhage is a common sign in acute rupture.
 

2. How can choroidal rupture affects the vision?

Answer
The location of the rupture and the presence of subretinal neovascular membranes are the important factors that can affect the vision.
If the rupture is away from the fovea, good vision may be maintained even with large rupture. However, as the Bruch's membrane is breached in choroidal rupture, subretinal neovascular membrane may be a late sight-threatening complication.
 

Return to the main page