Retinal tears and breaks
A common cause of retinal detachment is the formation of a tear or break in the retina. When this occurs, fluid from within the eye can pass through the opening and collect beneath the retina.
This fluid disrupts the normal attachment between the retina and its supporting layer.
Shows how the vitreous shrinks over time, possibly tearing the retina in the process, leading to vision changes. Routine check-ups are advised to avoid severe damage.Vitreous traction
The vitreous is a gel-like substance inside the eye that is attached to the retinal surface. Over time, it can shift or contract, creating pulling forces on the retina.
This traction can place stress on the retinal tissue and contribute to the development of a break or separation.
Describes the vitreous shrinking as we age, and the possibility of posterior vitreous detachment. Shows common symptoms, such as flashes of light. Though usually not dangerous, this overview advises patients to have an eye examination if symptoms of PVD are present.Fluid movement beneath the retina
Fluid can accumulate beneath the retina when the normal balance of fluid within the eye is disrupted. This may occur through a retinal break or through changes in the surrounding tissues.
As fluid collects, it lifts the retina away from its underlying support.
Surface traction from retinal changes
Changes on the surface of the retina can create areas of tension. As these areas contract, they may exert pulling forces that contribute to separation of the retina.
This process can develop gradually and may affect how the retina maintains its position.
Interaction of multiple mechanisms
Retinal detachment often develops through a combination of these processes. For example, traction on the retina may lead to a tear, which then allows fluid to pass beneath it.
These interacting mechanisms contribute to how detachment begins and progresses.
Why these changes lead to detachment
The retina relies on close contact with underlying structures to function properly. When this contact is disrupted by fluid or traction, the affected area can no longer process visual information effectively.
This results in changes in vision that may worsen as the separation increases.
Progression of detachment
Once the retina begins to separate, the affected area may expand as fluid continues to accumulate or traction persists. The extent of detachment can increase over a short period.
Prompt assessment is important to limit progression.