Refractive lens exchange with distance-dominant diffractive bifocal intraocular lens implantation.
OBJECTIVE
To assess efficacy, safety and predictability after refractive lens exchange (RLE) in patients who had bilateral implantation of a distance-dominant diffractive bifocal intraocular lens (IOL).


METHODS
Seventeen patients (34 eyes) were examined after RLE with bilateral implantation of a diffractive bifocal 447D IOL. Eyes were divided into myopic and hyperopic groups. Monocular uncorrected distance visual acuity, best-corrected distance visual acuity (BCVA), uncorrected distance near visual acuity, and best distance-corrected near visual acuity (BCNVA) were recorded preoperatively and 6 months after surgery.


RESULTS
Efficacy indexes were 1.10 for myopic and 0.98 for hyperopic eyes, at 6 months postoperatively. No eye lost > or = 1 line of BCVA. For the myopic group, four eyes gained 1 line, and six eyes gained > or = 2 lines; for the hyperopic group, three eyes gained 1 line, and five eyes gained > or = 2 lines. Safety indexes were 1.21 and 1.08 for myopic and hyperopic eyes respectively. No eye lost > or = 1 line of BCNVA. Safety indexes at near were 1.02 for myopic and 1.01 for hyperopic eyes. Efficacy indexes at near were 1.02 for myopic and 1.00 for hyperopic eyes.


CONCLUSIONS
Six-month results of bilateral implantation of a distance-dominant diffractive bifocal IOL for RLE demonstrated efficacy, safety, and predictability in correcting ametropia and presbyopia.
Alfonso
José F
JF
Fernández-Vega Ophthalmological Institute, Avda. Dres. Fernández-Vega 34, 33012, Oviedo, Spain. j.alfonso@fernandez-vega.com
Fernández-Vega
Luis
L
Ortí
Susana
S
Montés-Micó
Robert
R
D000328:Adult; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology; D019654:Lens Implantation, Intraocular; D007908:Lens, Crystalline / Q000601:surgery*; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology; D018918:Phacoemulsification; D011305:Presbyopia / Q000628:therapy; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D012030:Refractive Errors / Q000628:therapy; D014792:Visual Acuity / Q000502:physiology