Corneal keratoectasia and dry eye syndrome (DES) are two of the most prevalent eye diseases. A number of studies is being carried out aimed at identifying and analyzing the annual increase in incidence of these diseases in population strata. Treatment and rehabilitation of patients with keratoectasia and DES remain topical issues in modern ophthalmology. Conventional treatment methods are not always effective, and scleral lenses (SCLs) may be considered an alternative. In this article, the authors expand on technology of manufacturing of OKVision® SMARTFIT™ scleral contact lenses.
Plasma cleaning is considered to be an accurate cleaning method for high-quality applications in medical production. Differences of low-pressure and atmospheric pressure plasma technologies were analyzed. The main purpose of low-pressure plasma cleaning is the removal of thin organic films from surfaces. The positive effect of plasma treatment on the structure of gas permeable contact lenses surface is described in the article. Plasma cleaning, however, is the most suitable process for achieving optimum surface cleanliness. The given data was obtained by practical means.
The technology of contact lenses coloring is viewed as a way of giving soft contact lenses the tone that is differ-ent from the usual one. Various methods for coloring soft lenses are reviewed; their advantages and disadvantages are outlined. Application features depending on the desired result are described. Differences between tinted, colored and decorative lenses are given.
In our practice, we often encounter the issue of centering and stabilizing scleral contact lens (SCL) in the patient's eye. This is due to the fact that the haptic part of the SCL rests on the scleral conjunctiva, which itself is toric. Рurpose. To analyze possibilities of stabilizing scleral and mini-scleral lenses in patients with different scleral toricities. Material and methods. This study was a retrospective review of 17 patient records (34 eyes); 9 patients were male and 8 female. The mean age of the patients was 38 ± 12 years. Results. The horizontal visible iris diameter amounted to 11.85 ± 0.52 mm (11.0 to 12.5 mm). All patients previously underwent fitting of SCLs for correction of ametropia. Lens diameter was chosen based on the corneal diameter, while the shape of the patient's sclera determined stabilization method. This work describes a method for determining scleral toricity. An adequate fit of spherical SCLs was not achieved in patients with toric sclera; however, the correct choice of a stabilization method made it possible to achieve congruence of the lens edge with the scleral surface in all four quadrants and obtain a high visual acuity in all patients included in the study, regardless of the lens diameter. Conclusion. Stabilization of SCLs provided a safe and comfortable wearing experience. Key words: scleral lenses, mini-scleral lenses, lens edges, scleral conjunctiva, toric periphery, limbus
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