Vol 6, No 4 (2013)

The prevalence of corneal ulcer amounts to 47,3% of all inflammatory eye diseases. A corneal ulcer course may be complicated by perforation, and, as its result, by eyeball loss. In the article, the result of porous polytetrafluoroethylene (PTFE) use for tectonic keratoplasty is presented. The assessment result of cellular activity in the polymer body is shown using scanning electron microscopy (SEM). Technical moments of implant fixation to the cornea are explained, in particular PTFE covering with native tissues and temporary blepharorraphy are crucial. The presented method may serve as a first step in carrying out further optic-reconstructive procedures, which allow to achieve a rehabilitation of this patient category.

Twenty patients with stage 3 or 4 idiopathic macular holes were evaluated with standard cone ERG, photopic flicker ERG at 8,3-30-Hz, to study the function of cone photoreceptors, bipolar cells, and Muller cells after the surgical correction of their macular hole. The correlations between the ERG parameters and the microperimetry and optical coherent tomography data were evaluated. IMH has been associated with the general reduction in the function of the cone photoreceptors and bipolar cells and with the sharp increase in the activity of Muller cells and their functional relationships with some bipolar cells. The nature of the changes in photopic standard and flicker ERGs demonstrated the dependence of the central retinal function on the dynamics of cone bipolar cells’ recovery. In the early period after the surgery of IMH, a sharp reduction in the flicker ERG at 24 Hz was found, to be followed by a progressive increase, which indicated a pronounced reduction in the bipolar cell function with the formation of the IMH and its substantial decrease after the vitreoretinal surgery. A significant increase in the glial index for flicker ERG at 24 Hz may be associated with a compensatory overreaction of retinal Muller cells in the preoperative and in the recovery period after the closure of IMH.

66 healthy people (124 eyes) with different degrees of myopia and emmetropia were examined using enhanced depth imaging optical coherence tomography (EDI-OCT) using the “Spectralis OCT”. It was found that the choroid in subjects with medium and high degrees of myopia was significantly thinner than that in the control group. In the study, a negative correlation was found between the subfoveal choroidal thickness and the degree of myopia (r = -0.75, p < 0.0001). It was also found that the subfoveal choroidal thickness decreased for each diopter of myopia by approximately 18.03 μm.

The impact of lacrimal gland excision on tear production and qualitative tear fluid composition in patients after excision of a pathologically changed lacrimal gland (tumors, chronic dacryoadenitis).

Congenital hypertrophy of the retinal pigment epithelium is a benign pigmented lesion of the posterior pole with a unique clinical appearance. It is flat, round, and has sharp edges. While it is usually black, it may have internal lacunae without pigment. The lesion may also be all hypopigmented. Over many years, the lesions may grow slightly and change their pigmentation. Even though malignant transformation is extremely rare, annual examinations should be performed.