Visual impairment and its causes

Visual impairments have many causes. Whether it is a congenital visual defect or a loss of vision due to age, the effect is the same – poor vision. Here action must be taken to improve the visual acuity.

Objects are seen blurred, slightly blurred, the eyes hurt from exertion or watering. A visual impairment has a wide variety of symptoms and can have many causes. Persistent stress and fatigue can also cause poor vision. It is not only older people who have problems with their eyes. All ages can be affected by low vision or even eye disease. In any case, visual disturbances should always be taken seriously.

What visual impairments are there?

Further information on specific visual impairments can be found on the following pages.

Headache due to visual impairment

A common symptom of failing eyesight is a headache: a dull pressure behind the eyes, rhythmic throbbing in the temple, or a slight pounding under the top of the skull. People who have poor vision and actually need glasses often suffer from headaches. The constant (over)effort of always having to see sharply, for example during prolonged reading or computer work, causes headaches that are, however, rarely associated with the eyes.

In rare cases, sudden visual impairment can also be caused by acute circulatory problems in the eye. This is then called ocular infarction or visual collapse. Therefore, in this case, an ophthalmologist should be consulted immediately. He is responsible for the medical view of the eye and its health. In the case of general visual deficits such as nearsightedness, farsightedness, presbyopia and the like – which, by the way, are not diseases – a visit to an optometrist is advisable. He is a specialist in the analysis of refractive errors and their correction .

Headaches due to poor vision

Why do we suddenly see out of focus??

People with normal vision and healthy eyes clearly perceive the contours of objects and differences in color, both in strong lighting and in dim light. He can see people, houses, place-name signs in the distance as well as the small print in a book or newspaper. The eyes adapt to a change of perspective from near to far and vice versa in less than a second. This ability of the eye is called accommodation. It decreases with age, the lens loses its elasticity, the adaptation process takes longer and is more difficult around the age of 50. The visual acuity is largely lost around the age of.

Number of spectacle wearers in Germany

Improve vision – vision correction instead of habituation

Today, defective vision can be corrected in most cases with the help of suitable glasses or contact lenses. Those affected then see clearly again and experience what a spectacle wearer once described as follows: "Life suddenly becomes bright, clear, colorful and lively again."

More than 40 million Germans (over 16 years of age) wear glasses. That is almost two-thirds of the adult population of Germany. In 1953 it was still 43 percent. This increase is probably related to changes in living conditions, such as z. B. an increase in work on a computer screen, which requires precise vision. But the performance and high comfort of modern lenses and frames as well as the wide range of eyeglasses on offer have probably also played their part.

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