RU2239352C1 - Method for predicting symptomatic dry eye syndrome after lasic operation when correcting high degree myopia - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: method involves measuring linear blood circulation speed in lacrimal artery. The linear blood circulation speed magnitude being less than 10 mm/s, symptomatic dry eye syndrome occurrence is to be predicted.

EFFECT: enhanced accuracy of prognosis.

Description

The invention relates to ophthalmology and can be used to predict the occurrence of symptomatic dry eye syndrome after Lazik surgery with moderate and high myopia.

In recent years, in the works of domestic and foreign authors, increased attention has been paid to the role of the lacrimal gland in various eye pathologies.

In this regard, the ability to assess the functional state of the lacrimal gland, primarily the state of its blood flow, is an important factor in objectifying the state of the eye and its auxiliary apparatus.

With the development of laser surgery in the treatment of moderate and high myopia, the question arose about possible complications and undesirable consequences after these operations, including the symptomatic dry eye syndrome that is often encountered after Lasik, which can cause uncomfortable sensations in the eye, as well as a decrease in visual functions.

However, before the operation, nobody measured the linear blood flow velocity (LSC) in the lacrimal artery.

An object of the invention is to provide a method for predicting the occurrence of symptomatic dry eye syndrome after Lazik surgery with moderate and high myopia in order to select pre and postoperative treatment tactics to suppress the occurrence of symptomatic dry eye syndrome in the postoperative period.

The technical result according to the invention is achieved by the fact that in the method for predicting the symptomatic dry eye syndrome after Lazik surgery, for the correction of moderate and high myopia, the linear blood flow velocity in the lacrimal artery is measured, if the BFV is less than 10 mm / s, then the occurrence of symptomatic dry eye syndrome is predicted .

The method is as follows.

The studies were carried out on a Quantascop ultrasound machine from Vital Science (England). A 2 MHz sensor was used. The patient is placed in a supine position on the couch, on his back with closed eyelids. A sensor with contact gel previously applied to it is installed on the upper eyelid at the border between its outer and middle third in the projection area of the lacrimal gland at an angle of 38-45 ° to the skin. During the study, in the operating mode, the following parameters were introduced that were appropriate for the patient: the sounding depth, the diameter and angle of the lacrimal artery examination until a clear ultrasound signal was obtained, and the LSC was determined before the Lasik operation.

The authors studied LSC in the lacrimal artery in 80 patients with moderate and high myopia before Lasik surgery. When LSC was less than 10 mm / s in the lacrimal artery before Lazik surgery, the onset of symptomatic dry eye syndrome was observed in 40 patients.

The method according to the invention is illustrated by examples.

Example 1. Patient I., 21 years old.

Diagnosis: high degree myopia of OI.

OI - Shp - 8.0 OD = 0.9-1.0

Intraocular pressure (IOP) is within normal limits.

Eye Length: OD 27.64mm

OS 27.76 mm.

The fundus without dystrophic changes in the center and on the periphery.

Dopplerogram: OS: LSK - 8.1 mm / s.

OD: LSK - 7.2 mm / s.

Prior to Lazik’s surgery, conservative treatment was performed to increase the secretion of the lacrimal glands and blood flow in the lacrimal artery. After surgery, Lasik, when correcting a high degree of myopia, did not experience symptomatic dry eye syndrome.

Example 2. Patient M., 25 years old. Diagnosis: moderate myopia.

OI - Shp - 6.5D = 1.0

IOP OD = 18.9 mm RT. Art.

OS = 19.7 mmHg. Art.

Field of view within the normal range

Eye Length: OD = 26.75mm

OS = 26.89 mm

Fundus: without features.

Dopplerogram: OD: LSK - 7.4 mm / s

OS: LSK - 6.9 mm / s

Treatment before surgery Lasik was not carried out and after surgery there was a symptomatic dry eye syndrome. The patient complained of a burning sensation, dry eyes and a subjective decrease in visual function.

Claims (1)

A method for predicting the occurrence of symptomatic dry eye syndrome after Lazik surgery for the correction of moderate and high myopia, including measuring the linear blood flow velocity in the lacrimal artery, and if the linear blood flow velocity is less than 10 mm / s, then the occurrence of symptomatic dry eye syndrome is predicted.