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The retina is the nerve tissue that lines the inside back wall of your 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 3 F’s are the most common symptoms of a retinal detachment:
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 detachment:
Rhegmatogenous retinal detachments: Rhegmatogenous means “arising from a rupture,”...
Read more: Retinal Detachment - Symptoms, Signs and Treatment
Alzheimer's Disease International estimates that the number of people living with dementia worldwide - nearly 44 million in 2014 - will almost double by 2030 and more than triple by 2050.
There is no single test that can show if a person has Alzheimer's, but doctors can almost always determine if a person has dementia, although it may be difficult to determine the exact cause. Diagnosing Alzheimer's requires careful medical evaluation, neurological testing and sometimes brain imaging and blood tests to rule out other causes of dementia.
Most of the testing for early disease - MRI scans of the brain, brain PET scans looking for amyloid, and spinal taps looking for certain proteins in the spinal fluid - are not very accurate, they are invasive and they can be expensive.
Researchers have now turned to findings in the eye to help with early detection and are hoping to find ways to make the diagnosis earlier when potential treatments may have a better outcome. There is also...