Rashmi Hospital

Centre for Minimally Invasive Surgery & Maternity

190, Double Road, Indiranagar Bangalore 38

Tel: 25253311, 25251573, 25251139, 25200447

For Maternity, Gynaecology & ENT: 9880108844/9980015424

Keyhole surgeries performed

E-Mail: info@rashmihospital.com

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What is Myopia [Short-sightedness]?

Myopia is commonly known as short-sightedness. It means that the eye is unable to focus on distant objects, making them seem blurred. Vision can usually be corrected with glasses or contact lenses, or, in some cases, with laser eye surgery.

Myopia most commonly develops in childhood or early teens (between 8 and 14). The risk of developing myopia is increased if there is a family history of it. There may also be a link between myopia and prolonged close-up work, such as reading or sitting close to the television, although there is little scientific evidence for this.

Light coming into the eye is focused onto the retina - an area on the rear wall of the eyeball. Seventy per cent of light entering the eye is focused by the cornea (a clear dome which forms the outer covering of the pupil). The rest is focused by the lens, which sits behind the cornea. Normally, rays of light from a distant object are focused by the eye onto its retina, thus resulting in a clear image. In short sighted persons, the length of the eyeball is too great or its focusing power too high. Hence light is now focused in front of the retina instead of ON it.

If the light is focused properly on the retina, we see a clear image. If the light focuses in front of the retina, the image is fuzzy. See the illustration below.

With myopia, the cornea is too curved or the eyeball too long. This means that images are focused in front of the retina rather than directly on it.

To a short-sighted person, distant objects seem blurred, while near objects can be seen more clearly. Other symptoms can include headache and tired eyes.

Myopia develops as the eyeball grows, so it starts in childhood and may worsen during the teens. It normally stops getting worse in adults.

Children younger than eight may not realise they have blurred vision. Parents or teachers may suspect a child has myopia if they squint or frown a lot, hold books close to their face, or have trouble seeing a blackboard, television or cinema screen.

Another condition, long-sightedness (hyperopia), is a natural process of ageing. This may counteract the effects of mild myopia, so that some people with myopia find they can do without glasses for close work as they grow older. This is sometimes called "second sight".

Treatment of myopia