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The Retina
The light sensitive tissue that lines the inner surface of the eye is known as the retina. Retinal diseases vary from easily treated to difficult to diagnose, so making an appointment with an eye doctor in your area is vital for your long-term eye health. Ophthalmologists can pinpoint the differences in these diseases and will design a treatment plan to curb or stop vision loss due to retinal disorders.
The retina is crucial to vision, as it senses light and sends images to your brain. Located in the center of this nerve tissue is the macula, which provides sharp, central focus that helps you see the fine details needed for reading, driving and everyday sight.
Anatomy of the Retina
A complex and layered structure, the retina, with its several layers of neurons interlaced by synapses serves visual perception in retinal encoding and processing of light. These neurons, that are directly sensitive to light are called photoreceptor cells and are made of two types: rods and cones. Rods provide your black and white vision, while the cones aid daytime vision and the perception of color. Another type of photoreceptor cell exists to provide a reflexive response to bright light. The retina is part of the central nervous system and is the only part that can be seen with non-invasive methods.
Retinal Disorders
Retinal disorders affect the retinal tissue and can cause vision distortion or blindness. Some examples of retinal disorders are:
- Floaters – those little, dark specs in your field of vision
- Retinal detachment – a true medical emergency that happens when the retina pulls away from the back of the eye
- Macular pucker – scar tissue on the macula
- Macular hole – typically happens in those over the age of 60 and is seen as a small break in the macula
Diseases of the Retina
Ophthalmologists primary goal with diseases that affect the retina are to slow the progression of sight loss and to preserve eyesight. Many retinal diseases share common symptoms and treatment, though each is unique. Untreated, retinal diseases can escalate vision loss that can be irreversible. Those retinal diseases include:
- Cone-rod dystrophy (CORD) – disease loss from deterioration of the cones or rods
- Retinoblastoma – cancer of the retina
- Diabetic retinopathy – damage to the tiny blood vessels that supply the retina, caused from complications of diabetes
- Retinitis pigmentosa – a group of genetic diseases that affect the retina and cause loss of peripheral and night vision
Tips for Protecting Against Retinal Disease
People over the age of 65 should have regular eye exams. During these eye exams, the ophthalmologist or optometrist will dilate your pupils to view the inner eye. This allows the eye doctor to see the onset of eye disease that can begin without symptoms. See your primary care physician annually to check for diseases like diabetes and high blood pressure, both of which can lead to vision loss and retinal problems. See and eye doctor quickly if you suddenly experience any of the following:
- Sudden dimness or loss of vision
- Flashes of light
- Double vision
- Eye pain
- Redness or swelling of the eye or eyelid
About the Author
For more information about retinal diseases, or to make an appointment with an eye professional in your area, please visit www.eyes.com
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