RT Journal Article
T1 Patient-Perceived and Laboratory-Measured Halos Associated with Diffractive Bifocal and Trifoca Intraocular Lenses
A1 Alba Bueno, Francisco
A1 Garzón Jiménez, Nuria
A1 Vega Lerin, Fidel
A1 Poyales Galán, Francisco
A1 Millán García Varela, María Sagrario
AB Purpose: To examine and assess the halos generated in distance vision by multifocal intraocular lenses (IOLs) using both in vitro objective and in vivo subjective methods.Setting: The objective method was carried out in the optics laboratory of the Applied Optics and Image Processing Group (Universitat Politècnica de Catalunya -Barcelona). The psychophysical and subjective methods were carried out in the Instituto de Oftalmología Avanzada Madrid Innova Ocular.Design: Optical bench results and prospective evaluation of consecutive cases.Methods: The IOLs examined were TECNIS® one-piece bifocals with addition powers of +4.00 D, +3.25 D, and +2.75 D and the trifocals AT-LISA-tri® and FineVision®. In the objective assessment, we examined halos around the far focus images of a pinhole formed by each IOL in an optical bench. For the in vivo study, we recruited 100 patients who had been bilaterally implanted one month earlier with the IOLs under study. Participants were subjected to psychophysical halometry (Halo v1.0) on the eye with better, distance-corrected, visual acuity and were required to subjectively grade halos by responding to the question “How much do halos bother you?”Results: The objective method revealed that the halo size increased with addition power and that the two trifocals gave rise to a double-halo pattern. Scores in the halometry also indicated a direct relationship between the halo size and addition power. The subjective results indicated fewer complaints about halos associated with the trifocal than bifocal IOLs.Conclusions: The addition power of the tested IOLs affected both laboratory-measured and patientperceived halos. Trifocal lenses generated fewer complaints about halos.Precise: Multifocal intraocular lenses (MIOLs) give rise to halos observed by patients under conditions of dim lighting. This study compares laboratory characterized halos generated by five MIOLs with patientperceived halos.
PB Taylor & Francis
SN 0271-3683; 1460-2202 (e)
YR 2018
FD 2018-01
LK https://hdl.handle.net/20.500.14352/12551
UL https://hdl.handle.net/20.500.14352/12551
LA eng
NO Published online: 21 Nov 2017.Some of the data reported here were presented as a poster at the XXXIII ESCRS Meeting held in Barcelona in September 2015 (awarded first prize).
NO Ministerio de Economía y Competitividad
NO Fondos FEDER
DS Docta Complutense
RD 1 sept 2024