Where cataract is due to abnormal body metabolism, then treatment of the metabolic disorder can sometimes prevent development of cataract, or even reverse cataract where cataract has begun. Diabetes mellitus is a good example of this. Otherwise metabolic cataract can be treated by conventional methods. It should be said at once that in most countries of the world eye-drops and medicines of ill-founded clinical value, and rarely backed by any sound medical trials, are still available. Read the rest of this entry »
As we get older, all our blood vessels acquire harder walls, making it more difficult for the heart to pump blood through the whole system, especially the smaller vessels. Resistance to the flow of blood results in increased, or ‘higher’, blood pressure. The heart simply has to work harder in order to meet and overcome the developing resistance. The small vessels of the retina, or arterioles, can be examined minutely with an ophthalmoscope and changes of hardness in their walls easily seen. Because they are so small and fine they are sometimes the first to break down, so that if the blood pressure becomes very high they may leak blood and serum. When this happens the results can easily be seen on the surface of the retina between the vessels. Read the rest of this entry »
The retina, or rear receptor part of the eye, consists of a layer of different kinds of cell which meet the demands of different kinds of sight: detail and outline, colour, light and dark. But these cells cannot work unless they can produce the chemicals used to react with light energy, and the chemicals that are used to transmit the light-nervous energy to the brain. These chemicals and their application are a vastly complex subject which is still being explored; but it is known that all the products needed for retinal function come, in the last analysis, from the blood supply. Read the rest of this entry »
People whose eyes are stressed often see fleeting images. These are similar to the images on a television screen after a station has signed off: patterns and colors that move about but often appear gray and diffused. The eyes even mirror mental restlessness. You experience this as swishing images and incomplete darkness when you close your eyes.
Therefore, this exercise is a good way to measure your rental state, as well as your eyesight. When you shield tour eyes, the transition from a shimmering, gray state to leep blackness indicates the change from actively seeing o a totally relaxed, restful state. Read the rest of this entry »
