Оценка методов тонометрии при кератоконусе после имплантации интракорнеальных кольцевидных сегментов: сравнительное исследование

Assessment of Tonometry Methods in Keratoconic Eyes Following Intracorneal Ring Segments Implantation: A Comparative Study.

Keratoconus is a progressive, noninflammatory corneal ectatic condition characterized by the gradual steepening and thinning of the cornea. This leads to a significant degree of myopia and irregular astigmatism, resulting in a marked decline in visual acuity [¹]. Currently, various therapeutic options are available for visual rehabilitation in keratoconus, including intracorneal ring segments (ICRS) implantation [²]. ICRS are small polymethyl methacrylate (PMMA) devices inserted into the cornea to reshape its geometry and improve refractive qualities, ultimately enhancing the patient’s visual acuity [³,⁴]. Corneal ring segments do not alter central corneal thickness (CCT) [⁵]. These segments act as spacers between collagen fibers within the corneal stroma, inducing an arc-shortening effect that flattens the central corneal area. The degree of induced flattening is directly proportional to the thickness of the inserted segment and inversely proportional to its diameter [⁶,⁷].