Comparing visual acuity, range of vision and spectacle independence in the extended range of vision and monofocal intraocular lens

Daniel T Hogarty, Deborah J Russell, Bernadette M Ward, Nicholas Dewhurst, Peter Burt

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Importance: This study is the first to compare the extended range of vision (ERV) intraocular lens (IOL) targeted at micro-monovision to a monofocal targeted at binocular emmetropia. Background: Compares visual acuity, range of vision and spectacle independence in monofocal and ERV IOLs. Design: Assessor-blinded retrospective cohort study. Participants: Eighty-eight participants (176 eyes) with bilateral IOL implants at 5+ month postoperative review. Methods: Regression analyses (general estimating equations and multiple linear regression) tested associations between IOL type (ZA9002 Tecnis 3-piece or Tecnis ZCT monofocal; and Tecnis Symfony ERV IOL) and visual acuity, adjusting for key confounders including residual astigmatism. Main Outcome Measures: Monocular and binocular visual acuity measured with and without distance refractive correction at distance (3.00 m), intermediate (1.00 and 0.63 m) and near (0.40 m) (logMAR units); near vision reading test used British ‘N’ notation; self-reported spectacle independence. Results: There was no significant difference between ERV and monofocal groups in uncorrected binocular visual acuity at distance (P = 0.595). Binocular uncorrected visual acuity at intermediate (0.63 m: monofocal 0.24, ERV 0.09, P < 0.001) and near (0.40 m: monofocal 0.42, ERV 0.18, P < 0.001) were significantly better in the ERV group. Binocular uncorrected near vision: all the ERV group read N8 or better, compared to 36% in the monofocal group (P < 0.001); 93% of the ERV group reported spectacle independence at near compared to 33% in the monofocal group (P < 0.001). Conclusions and Relevance: The ERV IOL, targeted to achieve micro-monovision, demonstrated superior range of visual acuity and spectacle independence compared to the monofocal targeted to achieve emmetropia.

Original languageEnglish
Pages (from-to)854-860
Number of pages7
JournalClinical and Experimental Ophthalmology
Volume46
Issue number8
DOIs
Publication statusPublished - 1 Nov 2018

Keywords

  • cataract
  • intraocular lens
  • presbyopia
  • visual acuity

Cite this

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title = "Comparing visual acuity, range of vision and spectacle independence in the extended range of vision and monofocal intraocular lens",
abstract = "Importance: This study is the first to compare the extended range of vision (ERV) intraocular lens (IOL) targeted at micro-monovision to a monofocal targeted at binocular emmetropia. Background: Compares visual acuity, range of vision and spectacle independence in monofocal and ERV IOLs. Design: Assessor-blinded retrospective cohort study. Participants: Eighty-eight participants (176 eyes) with bilateral IOL implants at 5+ month postoperative review. Methods: Regression analyses (general estimating equations and multiple linear regression) tested associations between IOL type (ZA9002 Tecnis 3-piece or Tecnis ZCT monofocal; and Tecnis Symfony ERV IOL) and visual acuity, adjusting for key confounders including residual astigmatism. Main Outcome Measures: Monocular and binocular visual acuity measured with and without distance refractive correction at distance (3.00 m), intermediate (1.00 and 0.63 m) and near (0.40 m) (logMAR units); near vision reading test used British ‘N’ notation; self-reported spectacle independence. Results: There was no significant difference between ERV and monofocal groups in uncorrected binocular visual acuity at distance (P = 0.595). Binocular uncorrected visual acuity at intermediate (0.63 m: monofocal 0.24, ERV 0.09, P < 0.001) and near (0.40 m: monofocal 0.42, ERV 0.18, P < 0.001) were significantly better in the ERV group. Binocular uncorrected near vision: all the ERV group read N8 or better, compared to 36{\%} in the monofocal group (P < 0.001); 93{\%} of the ERV group reported spectacle independence at near compared to 33{\%} in the monofocal group (P < 0.001). Conclusions and Relevance: The ERV IOL, targeted to achieve micro-monovision, demonstrated superior range of visual acuity and spectacle independence compared to the monofocal targeted to achieve emmetropia.",
keywords = "cataract, intraocular lens, presbyopia, visual acuity",
author = "Hogarty, {Daniel T} and Russell, {Deborah J} and Ward, {Bernadette M} and Nicholas Dewhurst and Peter Burt",
year = "2018",
month = "11",
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Comparing visual acuity, range of vision and spectacle independence in the extended range of vision and monofocal intraocular lens. / Hogarty, Daniel T; Russell, Deborah J; Ward, Bernadette M; Dewhurst, Nicholas; Burt, Peter.

In: Clinical and Experimental Ophthalmology, Vol. 46, No. 8, 01.11.2018, p. 854-860.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Comparing visual acuity, range of vision and spectacle independence in the extended range of vision and monofocal intraocular lens

AU - Hogarty, Daniel T

AU - Russell, Deborah J

AU - Ward, Bernadette M

AU - Dewhurst, Nicholas

AU - Burt, Peter

PY - 2018/11/1

Y1 - 2018/11/1

N2 - Importance: This study is the first to compare the extended range of vision (ERV) intraocular lens (IOL) targeted at micro-monovision to a monofocal targeted at binocular emmetropia. Background: Compares visual acuity, range of vision and spectacle independence in monofocal and ERV IOLs. Design: Assessor-blinded retrospective cohort study. Participants: Eighty-eight participants (176 eyes) with bilateral IOL implants at 5+ month postoperative review. Methods: Regression analyses (general estimating equations and multiple linear regression) tested associations between IOL type (ZA9002 Tecnis 3-piece or Tecnis ZCT monofocal; and Tecnis Symfony ERV IOL) and visual acuity, adjusting for key confounders including residual astigmatism. Main Outcome Measures: Monocular and binocular visual acuity measured with and without distance refractive correction at distance (3.00 m), intermediate (1.00 and 0.63 m) and near (0.40 m) (logMAR units); near vision reading test used British ‘N’ notation; self-reported spectacle independence. Results: There was no significant difference between ERV and monofocal groups in uncorrected binocular visual acuity at distance (P = 0.595). Binocular uncorrected visual acuity at intermediate (0.63 m: monofocal 0.24, ERV 0.09, P < 0.001) and near (0.40 m: monofocal 0.42, ERV 0.18, P < 0.001) were significantly better in the ERV group. Binocular uncorrected near vision: all the ERV group read N8 or better, compared to 36% in the monofocal group (P < 0.001); 93% of the ERV group reported spectacle independence at near compared to 33% in the monofocal group (P < 0.001). Conclusions and Relevance: The ERV IOL, targeted to achieve micro-monovision, demonstrated superior range of visual acuity and spectacle independence compared to the monofocal targeted to achieve emmetropia.

AB - Importance: This study is the first to compare the extended range of vision (ERV) intraocular lens (IOL) targeted at micro-monovision to a monofocal targeted at binocular emmetropia. Background: Compares visual acuity, range of vision and spectacle independence in monofocal and ERV IOLs. Design: Assessor-blinded retrospective cohort study. Participants: Eighty-eight participants (176 eyes) with bilateral IOL implants at 5+ month postoperative review. Methods: Regression analyses (general estimating equations and multiple linear regression) tested associations between IOL type (ZA9002 Tecnis 3-piece or Tecnis ZCT monofocal; and Tecnis Symfony ERV IOL) and visual acuity, adjusting for key confounders including residual astigmatism. Main Outcome Measures: Monocular and binocular visual acuity measured with and without distance refractive correction at distance (3.00 m), intermediate (1.00 and 0.63 m) and near (0.40 m) (logMAR units); near vision reading test used British ‘N’ notation; self-reported spectacle independence. Results: There was no significant difference between ERV and monofocal groups in uncorrected binocular visual acuity at distance (P = 0.595). Binocular uncorrected visual acuity at intermediate (0.63 m: monofocal 0.24, ERV 0.09, P < 0.001) and near (0.40 m: monofocal 0.42, ERV 0.18, P < 0.001) were significantly better in the ERV group. Binocular uncorrected near vision: all the ERV group read N8 or better, compared to 36% in the monofocal group (P < 0.001); 93% of the ERV group reported spectacle independence at near compared to 33% in the monofocal group (P < 0.001). Conclusions and Relevance: The ERV IOL, targeted to achieve micro-monovision, demonstrated superior range of visual acuity and spectacle independence compared to the monofocal targeted to achieve emmetropia.

KW - cataract

KW - intraocular lens

KW - presbyopia

KW - visual acuity

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M3 - Article

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