Vision Of Elderly Can Improve

Elderly adults can improve their vision with perceptual training.

According to a study from the University of California, Riverside and Boston University elderly adults can improve their vision with perceptual training.  This has positive implications for the health and mobility of senior citizens.

UCR researchers and Boston University psychology professors conducted a series of experiments to determine whether repeated performance of certain visual tasks that are at the limits that one can see can improve the vision of adults older than 65.

The researchers found that with just two days of training, in one-hour sessions, with difficult stimuli resulted in older subjects seeing as well as younger college-age subjects.  The improvement was maintained for up to three months and the results were dependent on the location in the visual field where the stimuli were located - suggesting that the brain changed in early levels of visual cortex.

Age-related changes in vision - such as contrast sensitivity, dark adaptation, visual acuity, spatial vision, orientation, depth perception and motion perception - have been substantiated in numerous previous studies. This is the first study that demonstrates that perceptual training can be used to improve vision among the elderly in the earliest levels of visual processing.

The researchers used a texture discrimination test in which the participants were presented with stimuli consisting of a letter embedded in the center of a field of horizontally oriented lines. In addition to the letter, an array of peripherally located lines was oriented diagonally and formed either a vertical or horizontal object, always presented in the same quadrant. That was followed quickly with the display of a masking pattern. The task was to identify the central letter and the peripheral object.

 After age 60 there is a steady increase in the incidence of falls and automobile crashes that are associated with changes in visual processing reports the American Association for Long-Term Care Insurance which tracks health related issues impacting aging Americans.

Vitamin B May Help Dementia Alzheimer's Disease

A new study reveals that elderly individuals with mild cognitive impairment who take huge doses of B vitamins everyday may reduce the rate at which their brains shrink by 50%, resulting in a much slower progression toward dementia, and eventually Alzheimer's disease.

According to the findings of studies conducted by researchers from Oxford University, England, in an article published in Plos One (Public Library of Science One), this two-year clinical trial is the largest ever which examined the effect of B vitamins on "mild cognitive impairment" (MCI).

Individuals with MCI have a higher risk of progression to Alzheimer's disease and other forms of dementia notes Jesse Slome, director of the American Association for Long-Term Care Insurance the industry's trade group.

"People with mild cognitive impairment can function in everyday activities, but they may have problems with memory, such as recalling people's names, losing the flow of a conversation, and not remembering where they left things," Slome explains. Approximately 16% of individuals aged over 70 years are affected by mild cognitive impairment.

David Smith, University Department of Pharmacology and Department of Physiology, Anatomy & Genetics, University of Oxford, trial co-leader, said:

The single-center, randomized, double-blind controlled trial involved 168 volunteers who all had been diagnosed with mild cognitive impairment. One group received high daily doses of vitamins B6 (0.5 mg/d) and B12 (20 mg/d), as well as folic acid (0.8 mg/d). This was 300 times the recommended daily intake for B12, 15 times daily recommended amounts of B6, and 4 times daily recommended intake of folic acid.

The other group received a placebo (tablets without any active ingredients). Treatment lasted 24 months.

The principal outcome measure was the change in the rate of atrophy of the whole brain, assessed by serial volumetric MRI scans.

The researchers found that the B vitamin with folic acid group had an average brain shrinkage of 0.76% per year. The placebo group had an average brain shrinkage of 1.08% per year.

Those with the highest homocysteine blood levels at the start of the trial who took the B vitamins and folic acid experienced half the brain shrinkage compared to individuals with the highest homocysteine blood levels at the start and who received the placebo.

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