Learning about Your Eyes and when They Go Wrong
Understand how the eye works
Hence that you can see clearly, light rays have to be 100% focussed on the optic retina at the back of the eye. The beams of light that emanate from an image go through the clear cornea (covering of the eye) and then are bent as the travel through the eye’s secret lens, that manoeuvres the fine tuning of the focussing.
The viewable image is forged by the light sensitive retina commuting the light energy into electical impulses, which then communicate along nerves to the region at the back of the brain that processes vision. This occipital part of the cerebral cortex tells us what we are seeing
Short-sightedness (myopia)
With short sighted or myopic people, the eyeball is too long, relative to the focusing strength of the cornea and lens unit. So the rays of light that come from the distant object converge in front of the retina as the corneal/lens focussing unit is too powerful.
This means that achieving a clear image of an object in the distance becomes increasingly challenging. Focussing on objects near by is OK. And So kids may not learn as well as they can not read what is written on the white board very easily.
In general, children and teenagers are the most commonly affected group of patients. You may find that the whole family have to wear glasses as there is a genetic tendency. However, these parents are usually well aware of the tell tale signs and Thus tend to bring their kids to the care of opticians relatively quickly.
Spectacles are necessary to correct the focusing by creating another element to the cornea/lens unit, which distorts the visual image to allow it to focus on the retina more readily. It can be quite expensive to buy spectacles all the time. However, it is possible to buy your spectacles on line now. Myopia can also be handled by wearing contact lenses or even undergoing laser surgery to correct the defective visual unit
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