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Professional Development in the Kazakh Medical University of Continuing Education
Authors: Usebaeva N.Zh., Zetov A.Sh.
Number of views: 518
The "dry eye" syndrome is a common disease characterized by a variety of symptoms. According to the definition, «dry eye» is a multifactorial disease, which is accompanied by a disturbance and instability of the tear film and leads to xerosis of the cornea and conjunctiva. More than 1 billion people suffer from the disease worldwide, main risk factors include: age, sex (women are more likely to suffer due to wearing contact lenses), smoking, overusing modern digital technologies, for example: smartphones, computers. Patients may experience discomfort, impaired or blurred vision, dryness, feeling of a foreign body within the eye. All of the above affects the daily life of patients. The mechanism of the development of the disease is associated with impaired stability of the tear film, which is manifested by a change in the composition of the tear film. It should be noted that there are violations of the anterior epithelium of the cornea, which contributes to the formation of pre-cornea ruptures and thus leading to xerosis at the surface of the cornea. With age, cataracts develops, the treatment of which is reflected in the course of the "dry" eye syndrome. At the same time, phacoemulsification and the use of drops for conservative treatment for a long period of time aggravate the deterioration of the cornea. During the operation on the removal of cataracts, anesthetics are applied, which may contain benzalkonium chloride preservative. It contributes to the instability of the tear film and the disruption of mucine production, which is necessary to sustain hydrophilic properties to the epithelium. The impact of the operational light on the cornea during the operation should be considered thoroughly in order to prevent further negative consequences so the use of filters is recommended. A wide range of medications is used to treat this disease, namely tear replacements - "artificial tears". At the present stage, they differ in composition and mechanism of action. Of the greatest efficacy for patients after phacoemulsification were the drugs containing 1% sodium arboxymethylcellosellose. When prescribing these eye drops, the current condition of the ocular surface should be taken into account. Thus, the "dry" eye syndrome is a factorial disease that is characterized by a specific symptom complex. After the operation the "dry" eye syndrome should be treated.