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Analysis of excimer laser treatment outcomes and corresponding angle κ in hyperopic astigmatism.
Frings, Andreas; Druchkiv, Vasyl; Pose, Lumi; Linke, Stephan J; Steinberg, Johannes; Katz, Toam.
Afiliación
  • Frings A; University College London, Institute of Ophthalmology, England; Heinrich-Heine-University, Department of Ophthalmology, Düsseldorf, Germany; Care Vision Nuremberg, Nuremberg, Germany. Electronic address: andi.frings@gmail.com.
  • Druchkiv V; Medical University Hamburg, Hamburg, Germany; Care Vision Hamburg, Hamburg, Germany.
  • Pose L; Medical University Hamburg, Hamburg, Germany.
  • Linke SJ; Care Vision Hamburg, Hamburg, Germany; University Hamburg, Department of Ophthalmology, Hamburg, Germany; zentrumsehstärke - Augenarztpraxis am UKE, Hamburg, Germany.
  • Steinberg J; Care Vision Hamburg, Hamburg, Germany; University Hamburg, Department of Ophthalmology, Hamburg, Germany; zentrumsehstärke - Augenarztpraxis am UKE, Hamburg, Germany.
  • Katz T; Care Vision Nuremberg, Nuremberg, Germany; Care Vision Hamburg, Hamburg, Germany; University Hamburg, Department of Ophthalmology, Hamburg, Germany.
J Cataract Refract Surg ; 45(7): 952-958, 2019 07.
Article en En | MEDLINE | ID: mdl-31262484
PURPOSE: To investigate the prevalence of preoperative, intraoperative, and postoperative angle κ in hyperopic eyes and its effect on the refractive outcomes of excimer laser vision correction. SETTING: University Hospital Hamburg and Care Vision Refractive Centers, Germany. DESIGN: Retrospective multicenter study. METHODS: Hyperopic patients after laser in situ keratomileusis and before retreatment because of hyperopic regression were included. Three treatment groups were defined based on the magnitude of preoperative angle κ defined as low (<0.25 mm), moderate (0.25 to 0.50 mm), or high (>0.50 mm). RESULTS: The study analyzed 170 hyperopic eyes of 112 patients (mean age 29.8 years ± 10.04 [SD], range 21 to 62 years). The preoperative angle κ was low, moderate, or high in 23, 49, and 98 cases, respectively. In eyes with a preoperative angle κ of 0.25 mm or more, changes in the x-axes and y-axes of angle κ and its magnitude were statistically significant (P < .05) between preoperative and intraoperative measurements. In these eyes, intraoperative angle κ (offset) was statistically significantly smaller (P < .05), and Purkinje images were statistically significantly more caudal (P < .001). Treatment predictability was independent from using preoperative or intraoperative angle κ, and there were no statistically significant differences in efficacy or safety. CONCLUSIONS: A preoperative magnitude of angle κ as high as 0.50 mm or higher was present in more than 50% of regressed hyperopic eyes. Measuring angle κ preoperatively did not reflect its real-time intraoperative magnitude. Using the preoperatively larger angle κ as an intraoperative offset might result in a too nasally centered ablation that causes topographic and optical drawbacks; therefore, centering the ablation based on the intraoperative measured offset is recommended.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Refracción Ocular / Astigmatismo / Agudeza Visual / Córnea / Queratomileusis por Láser In Situ / Hiperopía Tipo de estudio: Observational_studies / Prognostic_studies Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: J Cataract Refract Surg Asunto de la revista: OFTALMOLOGIA Año: 2019 Tipo del documento: Article Pais de publicación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Refracción Ocular / Astigmatismo / Agudeza Visual / Córnea / Queratomileusis por Láser In Situ / Hiperopía Tipo de estudio: Observational_studies / Prognostic_studies Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: J Cataract Refract Surg Asunto de la revista: OFTALMOLOGIA Año: 2019 Tipo del documento: Article Pais de publicación: Estados Unidos