Object: rhegmatogenous retinal detachment (RRD), complicated by choroidal detachment (CD). Purpose: to optimize the diagnostics in patients with RRD complicated by CD, by improving the morphometric methods of ultrasound biomicroscopy (UBM) of the ciliary body structures, determining the significance of infrared diaphanoscopy (ID) in clarifying the features of the ciliary body structures, identifying the relationship between the intraocular pressure (IOP) and the morphometric features of the ciliary body, as well as the functional state of the retina based on the results of electrophysiological studies. Methods: visometry, refractometry, tonometry, perimetry, biomicroscopy, ophthalmoscopy; infrared diaphanoscopy for specifying the features of the ciliary body structure, IOP indicators and morphometric data of the ciliary body and detection of a relationship between them, electroretinography for studying the functional state features of the retina, ultrasound B-scan and the developed method of determining the ciliary body thickness on its detachment by UBM; statistical. The probability of development of CD in patients with RRD increases with axial length (AL) more than 25 mm and an average 4,74 mm wide ciliary body pars plana. The method of UBM revealed morphometric features of the ciliary body of eyes with RRD, complicated by CD, consisting in the fact that its pars plicata adjoins the sclera and has clear borders, and the pars plana is detached with pronounced disorganization of the outer layers. The thickness of the pars plicata of the ciliary body does not depend on the AL , therefore, it's higher relative to the fellow (intact) eyes, which is confirmed by the presence of signs of intraocular inflammation (conjunctival injection, ciliary pain, the presence of posterior synechia, vitreous opacities) which as a result of anti-inflammatory therapy is accompanied by a decrease in ciliary body pars plana thickness and it’s reattachment. Data has supplemented that the width of ciliary body pars plana in eyes with RRD, complicated by CD, has a direct relation with the AL of the eye, whereas the width of the pars plicata does not differ from those parameters. The width of the pars plana and pars plicata of the ciliary body on the affected eyes also does not differ from that on the fellow (intact) eyes. In patients with RRD complicated by CD, with hypotonia and intraocular inflammation, the fact of deepening of the anterior chamber (AC) was established (averaging 3,97 ± 0,39 mm) and a positive correlation between ACD and the height of CD, with the degree of detachment of the vitreous body, the ACD of the fellow intact eyes, the lens state, the degree of myopia, age, as well as the signs of intraocular inflammation (vitreous opacities, the presence of posterior synechiae), and an inverse strong correlation with the degree of hypotension, which indicates the severity of the initial state. The presence of CD in patients with RRD in the long term after surgical treatment leads to a deterioration of the functional state of the retina even with its complete reattachment, as evidenced by a decrease in the bioelectrical activity of the photoreceptor and bipolar cells of the central retina by 2,0–2,5 times (amplitude of the waves "a" and "b" of the photopic ERG), the decrease in the bioelectrical activity of the bipolar cells of the peripheral retina by 1,9–8,4 times (amplitude of the wave "b" combined and scotopic ERG), aggravating by the presence of myopia, especially high degree, as well as the worsening of trophic properties of the retinal inner layers by 4 times (amplitude of the oscillator potentials). The highly informative technique developed by us for UBM assessment of the anatomy-topographic changes of the ciliary body on its detachment in patients with RRD increases the accuracy of measuring the thickness of the ciliary body, regardless of the AL of the eye and the degree of detachment height of its pars plana. Implementation of the proposed method of UBM and ID allows to increase the efficiency of diagnostics of morphometric changes of the ciliary body, the degree of their severity (increase in width and thickness of the pars plicata, detachment and disorganization of the pars plana) is a significant criterion of intensity of the intraocular inflammation in RRD, complicated by CD, determines the initial severity of the disease. Complete recovery of the ACD after 3 and 6 months after preoperative anti-inflammatory therapy and the subsequent vitrectomy to the level of the values of the fellow eye is an additional criterion of effectiveness of the treatment of patients with RRD complicated by CD. The results of the work were implemented in SI «The Filatov Institute of Eye Diseases and Tissue Therapy of the National Academy of Medical Sciences of Ukraine», in the communal municipal clinical hospital №8, L’viv and the regional clinical hospital, Kharkov. Scope - medicine, ophthalmology.
