Common reasons for needing glasses.
Short-sightedness,or Myopia as it is known, simply means that the person can usually see some things up close but has poor distance vision. With glasses or contact lenses vision normally improves to a very high standard.
Long-sightedness, or Hypermetropia, is slightly more complicated as how well the person sees depends on how longsighted they are as well as what age they are. A young person, with low levels of Hypermetropia may use the muscles inside their eyes and be able to see clearly at all distances. However the price for this can be sore heads and eyestrain and in a young child there is a risk of a lazy eye or squint developing. As people get older the ability to overcome the long-sightedness becomes increasingly difficult, initially for near but eventually distance too will be poor unless the eyes are corrected with glasses or contact lenses.
Astigmatism can be thought of as the eye not being a football shape but instead more of a rugby ball shape. This means that the light reaching the back of the eye can never be focussed on one clear point but is always blurred both for distance and near. Astigmatism varies and at low levels may not cause much more than a slight lack of sharpness, which some people may be unaware of. However at high levels it can severely disrupt the vision. Providing the astigmatism has not gone undetected in childhood the vision should improve with the use of glasses or contact lenses.
Presbyopia is the name given to the condition by which people, usually at some point in their 40's, feel their reading vision has deteriorated. This is a natural change which happens to everyone and is noticed by some people sooner than others. Unfortunately the name Presbyopia is from the Greek language meaning old eye!
Ways to correct vision.
Nowadays there are several methods of correcting the vision in eyes which require improvement. At Brian Michie OPTICIANS we are happy to advise you on any or all of these.
Glasses still remain the most popular way of correcting the eyes. Spectacle lenses can be as simple or as sophisticated as required. Modern life creates a variety of visual demands on our vision and there are very few of these which cannot now be met by some form of spectacle lens.
Contact Lenses are now a well established way of correcting the vision. They offer freedom from glasses and can now cope with most prescriptions. They can be worn as the main way of correcting the eyes or as something which is only worn on an occasional basis. Modern materials are now more compatible with the eyes than they ever have been in the past.
Laser Surgery is the new kid on the block. It is more controversial than the others as it involves surgery on what is effectively a healthy organ. Good results can be obtained and the risks involved with the latest procedures are now much lower. For someone who only needs their distance vision corrected and is not keen on either glasses or contact lenses this could be an option.