title: Designing multifocal corneal models to correct presbyopia by laser ablation.
abstract: Two multifocal corneal models and an aspheric model designed to correct presbyopia by corneal photoablation were evaluated. The design of each model was optimized to achieve the best visual quality possible for both near and distance vision. In addition, we evaluated the effect of myosis and pupil decentration on visual quality. The corrected model with the central zone for near vision provides better results since it requires less ablated corneal surface area, permits higher addition values, presents stabler visual quality with pupil-size variations and lower high-order aberrations.
authors.affiliation: University of Granada, Laboratory of Vision Sciences and ApplicationsLaboratory of Vision Sciences and Applications, Department of Optics, Edificio Mecenas, Facultad de Ciencias, Avda Fuentenueva s/n, 18071 Granada, Spain. aixaalarcon@ugr.es
authors.forename: Aixa
authors.initials: A
authors.lastname: Alarcón
authors.forename: Rosario G
authors.initials: RG
authors.lastname: Anera
authors.forename: Luis Jiménez
authors.initials: LJ
authors.lastname: del Barco
authors.forename: José R
authors.initials: JR
authors.lastname: Jiménez
mesh_terms: D003315:Cornea / Q000033:anatomy & histology* / Q000601:surgery*; D048988:Corneal Surgery, Laser / Q000379:methods*; D006801:Humans; D008953:Models, Anatomic; D011305:Presbyopia / Q000601:surgery*; D011680:Pupil; D014792:Visual Acuity / Q000502:physiology