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Understand how the eye functions

Therefore that you can see clearly, light rays have to be totally convergent on the optic retina at the back of the eye. The rays of light that reflect from an image go through the clear cornea (covering of the eye) and then are refracted as the travel through the eye’s secret lens, that works the fine tuning of the focussing.

The viewable image is made by the light sensitive retina changing the light energy into electical neural impulses, which then run 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 orbit is too long, when compared to the focussing strength of the cornea and lens unit. And 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. 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 And So tend to bring their children to the aid of opticians relatively quickly.

Spectacles are necessary to set right 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 online spectacles now. Myopia can also be managed by wearing contact lenses or even undergoing laser surgery to correct the abnormal visual unit