Document Detail

Distance and near contrast sensitivity function after multifocal intraocular lens implantation.
MedLine Citation:
PMID:  12686237     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To evaluate contrast sensitivity at distance and near after multifocal intraocular lens (IOL) implantation. SETTING: Ophthalmologic Institute of Alicante, University Miguel Hernández, Alicante, Spain. METHODS: Contrast sensitivity was measured with the Stereo Optical Functional Acuity Contrast Test at distance and near in 21 patients with a refractive multifocal IOL (Array SA-40N, AMO). A control group with a monofocal IOL (SI-40NB, AMO) was also studied to allow comparison of results. Contrast sensitivity was measured 1, 3, 6, 12, and 18 months after IOL implantation. RESULTS: There was a statistically significant greater reduction in contrast sensitivity at distance at all spatial frequencies in the multifocal group than in the monofocal group during the first month. At 3 months, contrast sensitivity at 12 and 18 cycles per deg remained reduced in the multifocal group; contrast sensitivity at the other frequencies did not differ from that in the monofocal group (P > 0.1). At 6, 12, and 18 months, contrast sensitivity at all spatial frequencies was not significantly different between groups (P > 0.1). There was a statistically significant greater reduction in near contrast sensitivity in the multifocal group than in the monofocal group at all spatial frequencies during the first and third month after surgery (P <.01). No statistically significant differences were found between groups after 6 months (P > 0.1). Contrast sensitivity at distance and near in the multifocal group improved over time (P <.01). CONCLUSIONS: The Array IOL provided contrast sensitivity at distance comparable to that obtained with the monofocal IOL between 3 and 6 months after implantation. Near contrast sensitivity improved over time but was always lower than at distance and in the monofocal near-corrected patients, which is acceptable to avoid near visual function degradation.
Robert Montés-Micó; Jorge L Alió
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of cataract and refractive surgery     Volume:  29     ISSN:  0886-3350     ISO Abbreviation:  J Cataract Refract Surg     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-04-10     Completed Date:  2003-06-30     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8604171     Medline TA:  J Cataract Refract Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  703-11     Citation Subset:  IM    
Research, Development and Innovation Department, Ophthalmologic Institute of Alicante, and the School of Medicine, University Miguel Hernández, Spain.
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MeSH Terms
Contrast Sensitivity / physiology*
Lens Implantation, Intraocular*
Lenses, Intraocular*
Middle Aged
Prospective Studies
Pseudophakia / physiopathology*
Time Factors
Visual Acuity / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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