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Retinal Detachment- Symptoms, Signs and Treatment

retinal detachment
Retinal Detachment- Symptoms, Signs and Treatment

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The retina is the nerve tissue that lines the inside back wall of the eye.  Light travels through the pupil and lens and is focused on the retina, where it is converted into a neural impulse and transmitted to the brain.  If there is a break in the retina, fluid can track underneath the retina and separate it from the eye wall.  Depending on the location and degree of retinal detachment, there can be very serious vision loss.




Symptoms



The three most common symptoms of a retinal detachment are the three 3 Fs:

·      Flashes- flashing lights that are usually seen in peripheral (side) vision

·      Floaters-hundreds of dark spots that persist in the center of vision

·      Field cut- curtain or shadow that usually starts in peripheral vision that may move to involve the center of vision

 

Causes



Retinal detachments can be broadly divided into three categories depending on the cause of the retinal detachment:

·      Rhegmatogenous retinal detachments-  Rhegmatogenous means “arising from a rupture” so these detachments are due to a break in the retina that allows fluid to collect underneath the retina.  A retinal tear can develop when the vitreous (the gel like substance that fills the back cavity of the eye) separates from the retina as part of the normal aging process.

The risk factors associated with this type of retinal detachment:

1.     Lattice degeneration – thinning of the retina

2.     High myopia (nearsighted)- can result in thinning of the retina

3.     History of previous retinal break or detachment in the other eye

4.     Trauma

5.     Family history of retinal detachment

 

·      Tractional retinal detachments-These are caused by scar tissue that grows on the surface of the retina and contraction of the scar tissue pulls the retina off the back of the eye.  The most common cause of scar tissue formation is due to uncontrolled diabetes. 

·      Exudative retinal detachments- These types of detachments form when fluid accumulates underneath the retina. This is due to inflammation inside the eye which results in leaking blood vessels.   The visual changes can vary depending on your head position because the fluid will shift as you move your head.  There is no associated retinal hole or break in this type detachment.  Of the 3 types of retinal detachments, exudative is the least common type of detachment.

Diagnostic tests

·      A dilated eye exam is needed to examine the retina and the periphery.  This may entail a scleral depression exam where gentle pressure is applied to the eye to examine the peripheral retina.

·      A scan of the retina (optical coherence tomography) may be performed to detect any subtle fluid that may accumulate under the retina. 

·      If there is significant blood or a clear view of the retina is not possible then an ultrasound of the eye may be performed.

 

Treatment



The goal of treatment is to re-attach the retina back to the eye wall and treat the retinal tears or holes.  

In general, there are 4 treatment options:

·      Laser.  A small retinal detachment can be walled off with a barrier laser to prevent further spread of the fluid and the retinal detachment.  

·      Pneumatic Retinopexy.  This is an office based procedure that requires injecting a gas bubble inside the eye.  After this procedure, you need to position your head in a certain direction for the gas bubble to reposition the retina back along the inside wall of the eye.   A freezing or laser procedure is performed around the retinal break.  This procedure has about 70-80% success rate but not everyone is a good candidate for a pneumatic retinopexy.

·      Scleral buckle.  This is a surgery that needs to be performed in the operating room.  This procedure involves placing a silicone band around the outside of the eye to bring the eye wall closer to the retina.  The retinal tear is then treated with a freezing procedure. 

·      Vitrectomy. In this surgery, the vitreous inside the eye is removed and the fluid underneath the retina is drained.  The retinal tear is then treated with either a laser or freezing procedure.  At the completion of the surgery, a gas bubble fills the eye to hold the retina in place.  The gas bubble will slowly dissipate over several weeks.  Sometimes a scleral buckle is combined with a vitrectomy surgery.

 

Prognosis

The final vision after retinal detachment repair is usually dependent on whether the macula (central part of the retina you use for fine vision) is involved.  If the macula is detached, then there is usually some decrease in final vision after reattachment.  Therefore, a good predictor is initial presenting vision.  We recommend that patients with symptoms of retinal detachments (flashes, floaters, or field cuts) to have a dilated eye exam.  The sooner the diagnosis is made, the better the treatment outcome.

Having symptoms of retinal detachment? CALL US

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