Femtosecond laser correction of presbyopia (INTRACOR) in emmetropes using a modified pattern

• Verfasst von: Thomas, Bettina C. [VerfasserIn]
• Verfasst von: Fitting, Anna [VerfasserIn]
• Verfasst von: Auffarth, Gerd U. [VerfasserIn]
• Verfasst von: Holzer, Mike P. [VerfasserIn]
• Titel: Femtosecond laser correction of presbyopia (INTRACOR) in emmetropes using a modified pattern
• Verf.angabe: Bettina C. Thomas, Anna Fitting, Gerd U. Auffarth, Mike P. Holzer
• E-Jahr: 2012
• Jahr: December 1, 2012
• Umfang: 7 S.
• Fussnoten: Gesehen am 30.04.2018
• Titel Quelle: Enthalten in: Journal of refractive surgery
• Ort Quelle: Thorofare, NJ : SLACK Inc., 1996
• Jahr Quelle: 2012
• Band/Heft Quelle: 28(2012), 12, Seite 872-878
• ISSN Quelle: 1938-2391
• DOI: doi:10.3928/1081597X-20121115-03
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Aberrometry
• Sach-SW: Aged
• Sach-SW: Cell Count
• Sach-SW: Corneal Pachymetry
• Sach-SW: Corneal Stroma
• Sach-SW: Corneal Wavefront Aberration
• Sach-SW: Emmetropia
• Sach-SW: Endothelium, Corneal
• Sach-SW: Female
• Sach-SW: Humans
• Sach-SW: Laser Therapy
• Sach-SW: Light
• Sach-SW: Male
• Sach-SW: Middle Aged
• Sach-SW: Presbyopia
• Sach-SW: Prospective Studies
• Sach-SW: Refraction, Ocular
• Sach-SW: Scattering, Radiation
• Sach-SW: Surveys and Questionnaires
• Sach-SW: Visual Acuity
• K10plus-PPN: 1572476443

Abstract

PURPOSE: To evaluate functional results and corneal changes after femtosecond laser correction of presbyopia (INTRACOR, Technolas Perfect Vision GmbH) in emmetropes using a modified treatment pattern over a 12-month period. METHODS: Twenty eyes from 20 emmetropic patients were treated with a modified intrastromal INTRACOR pattern consisting of 5 central rings and 8 radial cuts in a prospective, nonrandomized, uncontrolled, open, single-center, clinical study. Refraction, visual acuity, endothelial cell density, corneal pachymetry, total corneal power, and stray light were evaluated preoperatively and 1 (except endothelial cell density and stray light), 3, 6, and 12 months postoperatively. Patients filled out a subjective questionnaire at 12 months postoperatively. RESULTS: Comparison of preoperative versus 12-month postoperative median values revealed a significant improvement in uncorrected near visual acuity (UNVA) from 0.60 (20/80) to 0.10 logMAR (20/25) (P<.0001) and a significant decrease in corrected distance visual acuity (CDVA) from -0.10 (20/16) to 0.00 logMAR (20/20), which equals a median loss of one line (P=.0005). Fifteen percent of patients lost two lines of CDVA in the treated eye. Subjective spherical equivalent refraction remained unchanged at 0.00 diopters (D) (P=.194). After INTRACOR treatment, significant corneal steepening of 1.40 D and midperipheral flattening of 0.50 D occurred (both P<.0001). Corneal pachymetry at the thinnest point and endothelial cell density did not change significantly (P=.829 and P=.058, respectively). CONCLUSIONS: After 12 months, the modified INTRACOR pattern improved UNVA in emmetropic patients without inducing a myopic shift or significant changes in endothelial cell density or pachymetry.