title: Correction of presbyopia in hyperopia with a center-distance, paracentral-near technique using the Technolas 217z platform.
abstract: To analyze the results of hyperopic patients treated with a peripheral presbyLASIK algorithm for the correction of presbyopia.
  
  
  
  The study included 44 eyes of 22 hyperopic patients treated with a peripheral presbyLASIK technique using a Technolas 217z excimer laser. Mean patient age was 56 years (range: 47 to 72 years), mean preoperative spherical equivalent refraction was +1.21 +/- 0.77 diopters (D) (range: +0.50 to +4.00 D), and mean spectacle near addition was +1.76 +/- 0.42 D (range: +1.00 to +2.75 D). The Peripheral Multifocal LASIK (PML) ablation pattern creates a multifocal corneal profile over a 6.5-mm diameter, performing the distance correction first in a 6-mm optical zone and then near correction in a 6.5-mm zone. Main outcome measures were uncorrected visual acuity (UCVA) and best spectacle-corrected visual acuity (BSCVA) for near and distance, spherical equivalent refraction, contrast sensitivity, and corneal aberrations.
  
  
  
  Six months postoperatively, mean binocular UCVA was 1.06 +/- 0.13 for distance and 0.84 +/- 0.14 for near. Mean postoperative spherical equivalent refraction was -0.42 D (range: -1.12 to +0.87 D). Two (4.5%) eyes lost 1 line of BSCVA for distance and near vision, and 20 (45%) eyes gained 1 line of distance BSCVA. Contrast sensitivity decreased for 3, 6, 12, and 18 cycles/degree. Corneal aberration analysis showed a slight increase in coma and decrease in spherical aberration.
  
  
  
  The peripheral presbyLASIK technique used in this study is a safe and efficient treatment that may improve functional near vision in presbyopic patients with low and moderate hyperopia (from +0.50 to +3.00 D).
authors.affiliation: Istituto Laser Microchirurgia Oculare, Brescia, Italy.
authors.forename: Roberto
authors.initials: R
authors.lastname: Pinelli
authors.forename: Dolores
authors.initials: D
authors.lastname: Ortiz
authors.forename: Anna
authors.initials: A
authors.lastname: Simonetto
authors.forename: Cristian
authors.initials: C
authors.lastname: Bacchi
authors.forename: Esperanza
authors.initials: E
authors.lastname: Sala
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Alió
mesh_terms: D000368:Aged; D000465:Algorithms; D001251:Astigmatism / Q000601:surgery*; D015350:Contrast Sensitivity / Q000502:physiology; D019781:Corneal Topography; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000601:surgery*; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D011305:Presbyopia / Q000601:surgery*; D011446:Prospective Studies; D011680:Pupil / Q000502:physiology; D011795:Surveys and Questionnaires; D014792:Visual Acuity / Q000502:physiology