Long-Term Stability of Minimally Invasive Radial Keratotomy for Mild to Moderate Keratoconus
| Autor: | Hideya Osawa, Kahoko Fujimoto, Tomoyuki Inoue, Tomomi Irie, Takashi Moriyama, Takako Miyamoto, Tetsuya Nishimura |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Keratoconus medicine.medical_specialty Visual acuity genetic structures medicine.medical_treatment Visual Acuity Astigmatism law.invention 03 medical and health sciences 0302 clinical medicine Postoperative Complications law Ophthalmology medicine Humans Minimally Invasive Surgical Procedures Dioptre Keratotomy Radial Retrospective Studies Keratometer business.industry General Medicine Nomogram Corneal Endothelial Cell Loss medicine.disease eye diseases Contact lens Radial keratotomy 030221 ophthalmology & optometry Female sense organs medicine.symptom business 030217 neurology & neurosurgery |
| Zdroj: | Asia-Pacific journal of ophthalmology (Philadelphia, Pa.). 6(5) |
| ISSN: | 2162-0989 |
| Popis: | PURPOSE This study aimed to evaluate the long-term stability of minimally invasive radial keratotomy (mini-RK) for eyes with mild to moderate keratoconus. DESIGN Retrospective observational case series. METHODS Eleven eyes from 6 patients with hard contact lens (HCL)-intolerant keratoconus underwent mini-RK and were followed up for more than 5 years. The mini-RK consisted of 8 radial incisions with depths of 90% of the thinnest corneal thickness, based on the Lindstrom nomogram. Best-corrected visual acuity (BCVA), keratometry, and corneal endothelial cell density (ECD) were examined preoperatively and for 5 to 10 years postoperatively. Changes in keratometric astigmatism were evaluated using power vector analysis. Severities of keratoconus preoperatively and 1 year postoperatively were graded using the Amsler-Krumeich classification. RESULTS The postoperative observation periods were from 6 to 10 years (mean, 7.9 years). There were no changes in the BCVA, ECD, and keratometric astigmatism. The mean keratometric refraction significantly decreased from 47.5 diopters (D) preoperatively to 44.0 D at 1 month after mini-RK (P = 0.037) and was stable over 5 years, whereas keratometric astigmatism did not change from preoperatively through the postoperative period (P > 0.59). Keratoconus of grade 2 or higher improved to lower grades. CONCLUSIONS The mini-RK treatment was safe and effective for HCL-intolerant eyes with mild to moderate keratoconus. |
| Databáze: | OpenAIRE |
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