Vacuum Compression Test

A vacuum compression test (VCT) is a method for studying the hydrodynamics of the eyeball, which allows you to assess the state of the outflow of intraocular fluid (IOH). This method is widely used in ophthalmology for the diagnosis and treatment of various eye diseases.

VCP consists of creating negative pressure in the anterior chamber of the eyeball using a special device - a vacuum chamber. In this case, compression of the outflow tracts of the intraocular fluid occurs, which makes it possible to assess their patency and functional state.

To carry out VCP, a special suction cup is used, which is applied to the surface of the cornea. A vacuum chamber is then placed on the cap, which creates negative pressure inside the eyeball. As a result, compression of the outflow channels of the intraocular fluid occurs and its accumulation in the anterior chamber.

Evaluation of the results of VCP is carried out by measuring the level of VAG in the anterior chamber and analyzing its composition. This makes it possible to determine the presence or absence of disturbances in the outflow of intraocular fluid, as well as to identify possible causes of these disturbances.

The use of a vacuum compression test allows you to quickly and accurately assess the state of hydrodynamics in the eyeball and take the necessary measures to treat eye diseases. The method is widely used both in clinical practice and in scientific research.

Vacuum compression test for studying the eye's eye pressure.

Aqueducts are the main source of fluid entering the posterior chamber of the eye and one of the obstacles to the therapeutic effect of mydriatic drugs. Congenital dysplasia of short processes of the trabecular meshwork, disruption of intracameral fluid exchange, mechanical obstacles (opacities, cysts), etc. are the most common causes of the development of buphthalmos. Often the onset of the disease is associated with insufficient iridotomy, medicated pupils, inflammatory eye diseases, etc.[2]. In diagnosing the presence of dysgenesis of the short process of the lens and SDC, the described technology of direct laser exposure to the iris tissue can be fully helpful, which makes it possible to fairly reliably predict the outcome of the procedure in the treatment of high myopia. This criterion is also convenient to use as a pre-test for PPLT and ASTIGMA. The disappearance of perimetry and constriction of the pupil is an almost 100% sign of patency of the outflow tract. This “correct sample” test is advisable to use at any stage of diagnosis. It should be noted that in children aged 8 to 16 years, the decrease in perimetry disappears 24 hours after the injury, gradually recovering and after a week does not exceed 0.5 mm. The sensitivity of such a test in children is 93%, and in adults – 76%. It should also be noted that after injury to the A-B pair (1 mm at a distance of 0-13 cm, no more