Ultraviolet crosslinking of corneal collagen in combination with personalized transepithelial photorefractive keratectomy using Microscan Visum excimer laser

Treatment of keratoconus in the early stages can be aimed not only at stabilizing the process of ectasia, but also at improving refractive indices, which leads to an improvement in the quality of life of the patient. In our work, we demonstrate the experience of simultaneous excimer laser photorefractive treatment and ultraviolet crosslinking of corneal collagen according to the standard Dresden protocol. The patients were divided into two groups: 1 group (control group) 10 patients (10 eyes) - patients who underwent the standard Dresden protocol of ultraviolet crosslinking; Group 2 (study group) 10 patients (10 eyes) - patients who underwent simultaneous personalized photorefractive keratectomy with UV crosslinking according to the standard Dresden protocol. Parameters such as visus, refraction spheroequivalent, keratometry, pachymetry, presence and depth of the demarcation line were evaluated according to the OCT of the cornea. Also, using the Tomey TSM-5 keratotopograph, we recorded the surface regularity index (SRI), the index of surface asymmetry (SAI), the index of the probability of the presence of keratoconus Clays/Maeda (KCI), the keratoconus severity index (KSI), as well as the Ectasia Suspect Interpreted Index (ESI), which is half-measured using a Scheimpflug camera. Ultraviolet crosslinking of corneal collagen in combination with personalized transepithelial photorefractive keratectomy on an excimer laser Microscan Visum is effective in the treatment of patients with keratoconus stage I-II, improves functional vision indicators by modeling the shape of the cornea, reducing its irregularity zone and has a stabilizing effect on ectasia