Other names: visual impairment, reduced visual acuity, visual disturbance, visual disturbances

Vision impairment may be a separate eye condition, but also a manifestation of some major diseases of other organs and systems. There may be a fault in visual acuity, visual field defects,impaired adaptation to darkness (night blindness), failure of perception or color vision, double vision or other phenomena.

Impaired visual acuity

The most common visual defect is a change in visual acuity within the meaning of nearsightedness(myopia), which may be genetically determined (inherited), the child begins usually in early school years wearing glasses for distance or acquired over the years in relation to “the stress” Eye For example, in school, at work, at your computer like. in contrast, farsightedness (hyperopia) or rather presbyopia (presbyopia) is typical for older age when almost everyone wears reading glasses.

Myopia is corrected with diverging, farsightedness clutch. Both defects can add astigmatism (cylindrical eyesight).

Eyesight can over the years, always one step worsen (mostly in puberty myopia), but sometimes also to improve (at maturity) due to hormonal changes. In old age he will not improve eyesight. Also important are regular checks for people wearing glasses or contact lenses every few years, though their eyesight did not deteriorate (Unfortunately, people often go to the doctor only when something is bothering), especially in more severe defects (more diopters) must follow certain parameters, to avoid any complications.

other diseases

Visual impairment in otherwise well-sighted person can be different eye diseases (e.g. glaucoma in increased intraocular pressure) or, as already mentioned, can also occur in other diseases completely.An example is a pituitary tumor (pituitary, which is part of the brain), which if reaching larger dimensions, compressing the brain visual pathway in a so-called. Chiasm (crossing). This is reflected tubular vision, thus reducing the field of view, so ill person has no peripheral vision, ie. See to the sides.

Tumor smaller dimensions is readily operable, it is therefore necessary for it in time to come. Treatment may be medication.

Another example may be visual impairment in diabetes or high blood pressure, which is already the very serious condition of the retina, as soon as you see your doctor and take care guidelines that will give you!

Blurred vision sometimes accompanies various infectious and febrile diseases in which it is usually a temporary condition that after the retreat of the acute stage of retreats.