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Laser Vision SA Reception Area

Blurred Vision Information

Blurred vision can be due to many causes. In most people it is simply because they need glasses or contacts, with which they see clearly.

If this is you, it is likely you will benefit from laser vision correction. There are three causes of blurred vision that can be corrected with glasses or contacts.

  • Myopia or short sightedness
  • Hyperopia or long sightedness
  • Astigmatism

Vision problems occur because of poor focus of light on the back of the eye (the retina) by the cornea (the front surface of the eye) and the “crystalline” lens inside the eye. This is called refractive error, which includes near or short sightedness and astigmatism. Glasses and contact lenses work by changing focus of light before it enters the cornea.

Note: Laser Vision Correction cannot improve vision impaired due to reasons other than the need for glasses or contacts. For example, LVC cannot restore vision lost to diabetes, cataract, glaucoma, age related macular degeneration or poor vision in one eye from childhood.

  • Near Sighted (Myopia)
    Near Sighted (Myopia)

    Can you see things clearly only when they are close?

    Distance objects are blurred. This may be corrected by flattening the front curve of the cornea with cool painless excimer laser, or by placing an Implantable Collamer Lens (ICL) between the coloured part of the eye (the iris) and the crystalline lens in the “posterior chamber” of the eye.

  • Far Sighted (Hyperopia)
    Far Sighted (Hyperopia)

    Can you see things clearly only when they are far away?

    As it advances, or when it is more than moderate, you may not be able to see things clearly close or far. It can be also corrected with laser vision correction or an ICL like myopia. Hyperopia can also be treated with removal of the crystalline lens once it no longer changes shape for focusing up close , when people start to need reading glasses between the ages of 45 or 55. The crystalline lens has not usually yet gone cloudy (cataract) so this procedure if performed is called a clear lens extraction. In the same procedure an intraocular lens (IOL) implantation is performed. The IOL includes the patients spectacle or contact lens prescription reducing their dependence on these optical aids. The IOL may even be multifocal, reducing the need for reading glasses as well.

  • Astigmatism
    Astigmatism

    Do you get ghosted or double vision from one eye?

    This may be because of a condition called astigmatism where instead of the eye’s lenses being equally curved like the front of a basketball they are shaped more like an Aussie rules football with a steep curve across the laces and a flat curve point to point. With two curves light is focused in two places in the eye causing blurred or even ghosted or double vision out of the one eye. People with astigmatism may also have myopia or hyperopia.

    Astigmatism can be treated with laser vision correction, clear lens extraction, or an ICL depending on how the astigmatism is combined with myopia or hyperopia, the patient’s age, and visual needs

  • Presbyopia
    Presbyopia

    Do you need reading glasses?

    Presbyopia occurs when the crystalline lens inside the eye is no longer soft and flexible and is unable to change shape to “zoom in” from distance to near. This has been happening since birth, but at about 45 to 55 years, for normal sighted people, the crystalline lens has become too stiff for us to focus up close to read. We then need additional focussing assistance in the form of reading glasses. Presbyopia can be treated with leaving one eye focussed a little at near (monovision) or using multifocal intraocular lens implants (IOLs)

    Presbyopia is an important consideration when developing a personalised vision correction plan, particularly for patients approaching or beyond 45 years of age.