Previously, poor people suffered mainly from the elderly, but now more and more such disorders are found among young people and children. This is affected by many adverse factors, including ecology and diet. To solve the problem, it is important to know why the deterioration of eyes has begun - the reasons sometimes lie in serious diseases of internal organs, viral or bacterial infections.
Visual impairment after 40 years
The visual acuity in many respects depends on the state of the retina containing light-sensitive pigments. Over time, they are destroyed, this is called age-related changes in the body, which affects the quality and clarity of the picture. In addition, after 40-45 years presbyopia (farsightedness) takes place.
Other reasons for the age-related decline in visual acuity are the progression of chronic diseases of the digestive, cardiovascular and musculoskeletal system. For women after 45 years, also hormonal disturbances in menopause are also relevant, which also provokes impairment of eye functions, especially if fluctuations in prolactin concentration are observed.
Causes of severe visual impairment
Among the most common factors:
- Optical neuropathy;
- intracranial hypertension;
- neuritis with multiple sclerosis;
- temporal arteritis ;
- Attacks of amblyopia with edema of the optic nerve;
- fractures in the base of the skull;
- sharp deterioration of blood circulation in the capillaries and vessels of the eyes.
Also, the causes of intense temporary impairment of vision may be psychogenic states and retinal migraines. Often, such situations arise after mental overstrain, stress, anxiety, or fright. In the case of migraine, there is sometimes a periodic complete loss of vision followed by its restoration.
An important role is played by such reasons as:
- chronic dryness of mucous membranes;
- lack of sufficient mobility of muscles ("lazy eye");
- overvoltage;
- cataract;
- keratitis;
- glaucoma ;
- myopia;
- hypermetropia;
- the throat;
- mechanical eye injury.
Deterioration of vision after laser correction
Unfortunately, progress in ophthalmology has not yet reached the level at which it can guarantee a successful outcome of the procedure. Many patients note that after correction of LASIK vision is still deteriorating or returning to preoperative indicators.
Nevertheless, laser treatment remains the most effective method of treating myopia, it allows slowing its progression.