Causes
By Mayo Clinic staffRetinal detachment can occur as a result of:
- Sagging or shrinkage of the jelly-like vitreous that fills the inside of your eye
- Trauma
- Advanced diabetes
- An inflammatory disorder
How retinal detachment occurs
Retinal detachment can occur when vitreous liquid (vitreous humor) leaks through a retinal hole or tear and accumulates underneath the retina. Small retinal holes or tears can develop where the retina has thinned due to aging or with other retinal disorders. Retinal detachment due to a tear in the retina typically develops when there is a sudden separation of the vitreous from the retina. Less commonly, fluid can leak directly underneath the retina, without a tear or break.
As liquid collects underneath it, the retina can peel away from the underlying layer of blood vessels (choroid). The areas where the retina is detached lose their blood supply and stop functioning, so you lose vision.
Aging-related retinal tears that lead to retinal detachment
As you age, your vitreous humor may change in consistency and shrink or become more liquid. Eventually, the vitreous may sag and separate from the surface of the retina — a common condition called posterior vitreous detachment (PVD), or vitreous collapse.
As the vitreous separates or peels off the retina, it may tug on the retina with enough force to create a retinal tear. Left untreated, the tear can progress to a retinal detachment.
PVD can cause visual symptoms. You may see flashes of sparkling lights (photopsia) when your eyes are closed or when you're in a darkened room. New or different floaters may appear in your field of vision.
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- Arroyo JG. Retinal detachment. http://www.uptodate.com/home/index.html. Accessed Oct. 11, 2010.
- Posterior vitreous detachment, retinal breaks and lattice degeneration. San Francisco, Calif.: American Academy of Ophthalmology. http://one.aao.org/asset.axd?id=99eddbb5-cf3e-4619-a411-887961b738a2. Accessed Oct. 8, 2010.
- Fletcher EC, et al. Retina. In: Riodan-Eva P, et al. Vaughan & Asbury's General Ophthalmology. 17th ed. New York, N.Y.: The McGraw-Hill Companies; 2008. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=19. Accessed Oct. 8, 2010.

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