[Changes in the precorneal tear film at various stages of keratoconus].

Unlabelled: The combination of keratoconus (KC) with signs of dry eye disease (DES) has been described in numerous scientific publications. At the same time, there is a relationship between KC stage and an increase in the severity of DES symptoms, however, there is still no common understanding of the severity of xerotic process depending on the clinical course of keratectasia.

Purpose: This study assesses the changes in the state of the precorneal tear film in KC relative to the stages of the disease.

[Effect of conventional and orthokeratological hard contact lenses on anatomical and functional characteristics of the cornea].

Unlabelled: Contact lenses are widely used for correction of myopia due to their accessibility, effectiveness and relative safety.

Purpose: This study evaluated the potential effects of conventional hard contact lenses (HCL) and orthokeratological contact lenses (OKL) on anatomical and functional condition of the cornea in myopia correction.

Material And Methods: The study included 80 patients (159 eyes) with low, moderate and high myopia.

[Changes in precorneal tear film and ocular surface in keratoconic patients after corneal collagen cross-linking].

The article reviews the current available data on the signs and symptoms of dry eye syndrome (DES) in patients with keratoconus (KC), describes the clinical features of DES in KC patients and the morphological features of this type of keratectasia that lead to manifestations of the «dry eye», and highlights the risk factors, consequences of therapeutic measures, concomitant ophthalmological and general somatic diseases that contribute to the development of DES in KC.

[Prospects for early detection of keratoconus based on systems built for computer-assisted diagnostics of structural changes in the cornea].

The article is devoted to the problem of diagnosing subclinical keratoconus (KK). The need to identify early signs of KK is primarily associated with the potential for the development of iatrogenic keratoectasia in cases of underdiagnosis of the disease when determining the conditions for laser keratorefractive surgery involving a decrease in the thickness of the cornea. Today generally accepted algorithms for early computer-assisted diagnosis of KK are mainly based on the analysis of various morphometric parameters of the cornea, reflecting changes in its shape and thickness induced by structural abnormalities.

[Precorneal tear film after corneal collagen cross-linking in keratoconus (preliminary report)].

Purpose: To study the condition of precorneal tear film in keratoconus patients after corneal collagen cross-linking (CXL).

Material And Methods: The study enrolled 24 patients (30 eyes) with stages I-III progressive keratoconus. All study patients underwent standard (Dresden) protocol CXL.