Refractive errors or Ametropia

With ametropic vision you do not see clearly in certain situations without glasses. This visual defect usually does not appear suddenly; it is a gradual process in which the vision slowly deteriorates.

This means the eyes can adapt to a more or less bad visual impression; a defective vision often remains unnoticed. Usually only such symptoms as headache and/or musculo-skeletal disorders are noticed. It makes sense to check every two to three years with your optometrists/optician to check your eyesight; an ophthalmologist will check for possible medical causes.

Four common refractive errors or ametropia are explained

  • Myopia: can also be called near-sightedness OR short-sightedness. Far vision is disabled, it is possible to see things close up. This refractive error can be corrected with far vision glasses.S0058240-blur-Brille-clear-a150dpa-500
  • Hyperopia: can also be called far-sightedness OR long-sightedness. Vision may be possible at all distances, but it may be only possible with strain and effort to see things sharp. Symptoms like headaches, musculo-skeletal disorders, eyestrain and pressure may occur. Vision can be corrrected with far vision glasses, computer glasses or reading glasses.
  • Presbyopia: a condition which relates to aging, starting at about 40 years of age. Far vision may be still possible if no myopia or hyperopia exists. Reading at close distances is not possible. You should wear near vision and/or monitor glasses. If you are myopic or hyperopic you should wear progressive lenses.
  • Astigmatism  blurred vision due to an irregular or toric curvature of the cornea or lens, you have to wear far vision glasses.

For more information about the different states of refractive errors or ametropia please follow the above links.

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