RETINAL DETACHMENT

Causes, Symptoms and Treatment

Retina is the light-sensitive layer of tissue that lines the inside of the eye and sends visual messages through the optic nerve to the brain. Retinal detachment is a serious problem that usually affects middle-aged or older people. Retinal detachment is caused by a combination of factors including retinal holes, retinal breaks or retinal tears, liquefaction of the vitreous humor , and mechanical forces on the retina , often referred to as "traction". It is the tissue that turns light INTO an electrical signal to send to the brain. The retina receives oxygen and nutrients from the underlying choroid (vascular layer) of the eye. Rays of light enter the eye and are focused onto the retina by the cornea and the lens. The retina is composed of two main parts; a central macular area and a much larger peripheral retina. Retinal detachment occurs when the retina separates from the choroid. Its job is to translate what we see into neural impulses and send them to the brain via the optic nerve .

Retinal detachment refers to separation of the inner layers of the retina from the underlying retinal pigment epithelium (RPE, choroid). In some cases there may be small areas of the retina that are torn. It is a problem that occurs most frequently in the middle-aged and elderly. The retina is a thin disc-shaped layer of light-sensitive tissue on the back wall of the eye. The retina produces a picture which is sent along the optic nerve for the brain to interpret. If not promptly treated, retinal detachment can cause permanent vision loss. The retina is a thin sheet of light sensitive nerve tissue lining the inside of the eye. The detached retina should be recognized and treated promptly.

Causes of Retinal Detachment

Common causes and risk factor's of Retinal Detachment include the following :

• Eye injury.
  
• Diabetes.
  
• High level of nearsightedness.
  
• Sickle cell disease.
  
• Cataract surgery.

Symptoms of Retinal Detachment

Some common Symptoms of Retinal Detachment :

• Flashes of light.
  
• A sudden dramatic increase in the number of floaters.
  
• Blurred vision.
  
• A ring of floaters or hairs just to the temporal side of the central vision.
  
• Shadow or blindness in a part of the visual field of one eye
  
• Poor vision.
  
• Vision becomes blurry.

Treatment of Retinal Detachment

• In some cases a scleral buckle, a tiny synthetic band, is attached to the outside of the eyeball to gently push the wall of the eye against the detached retina.
  
• In rare cases where other types of retinal detachment surgeries are either inappropriate or unsuccessful, silicone oil may be used to reattach the retina.
  
• Retinal tears with minimal or no detachment may be treated with laser or freezing procedures. Some retinal tears do not require treatment.
  
• Pneumatic retinopexy is a newer method for retinal detachment repair. It is not suitable for all types of detachment.

RETINAL PIGMENTOSA

Causes, Symptoms, and Treatment

Retinitis pigmentosa causes the degeneration of photoreceptor cells in the retina. There are types of photoreceptor cells: rod cells and cone cells. The rate of decline varies depending on the genetic makeup of the disorder and also varies somewhat in individuals. A light is shone in the eye and the electroretinogram records electrical changes in the retina. They can occur in very young children causing a lifetime of blindness or rob the elderly of their precious independence. Retinitis pigmentosa (RP) is a rare, inherited disease in which the light-sensitive retina of the eye slowly and progressively degenerates. The rods are located in the periphery of the retina and are responsible for peripheral and night vision.

RP causes the thin layer of tissue in the back of the eye, which is called the retina, to deteriorate. Photoreceptor cells capture and process light helping us to see. As these cells degenerate and die, patients experience progressive vision loss. In the progression of symptoms for RP, night blindness generally precedes tunnel vision by years or even decades.

These regions of the retina reflect the cell apoptosis by having decreased nuclei in the outer nuclear layer. An exam of the retina is done using an indirect ophthalmoscope, an instrument that enables the doctor to examine the different parts of the eye through a dilated pupil. An exam of the retina is done using an indirect ophthalmoscope, an instrument that enables the doctor to examine the different parts of the eye through a dilated pupil.

RP is a group of inherited disorders in which abnormalities of the photoreceptors ( rods and cones ) or the retinal pigment epithelium (RPE) of the retina lead to progressive visual loss. Histopathologic changes in RP have been well documented, and, more recently, specific histologic changes associated with certain gene mutations are being reported.

Causes of Retinitis Pigmentosa

There are various factors which give rise to the disease Retinitis Pigmentosa. RP may be caused by a breakdown in the function of the rods or the cones in some part of the retina. The retina is so complex that breakdowns may occur in a variety of ways and so RP is not a single disorder but a great number of disorders. The breakdown of cone function may be called Macular Degeneration. There are other disorders similar to RP like Gyrate Atrophy, Choroideremia etc. The common feature is the degeneration of the retina for one reason or another.

Symptoms of Retinitis Pigmentosa

Some of the common sign and symptoms of the diseaseRetinitis Pigmentosa are as follows:

• Vision decreased at night or in reduced lightl.
  
• Loss of peripheral vision.
  
• Loss of central vision.

Treatment of Retinitis Pigmentosa

Find effective treatment methods of treating Retinitis Pigmentosa :

• These photoreceptors developed and made the necessary neural connections to the animal's retinal nerve cells, a key step in the restoration of sight .
  
• Controversial studies have suggested that treatment with antioxidant agents may delay the disease from getting worse.
  
• There is no standard treatment for retinitis pigmentosa.
  
• A blood test must be taken to ascertain liver function and Vitamin A levels in the blood BEFORE taking this treatment.