Contrast sensitivity and visual acuity in subjects wearing multifocal contact lenses with high additions designed for myopia progression control

Katarzyna Przekoracka, Krzysztof Michalak, Jan Olszewski, Fabrizio Zeri, Andrzej Michalski, Joanna Paluch, Anna Przekoracka-krawczyk

Research output: Contribution to journalArticle

Abstract

Objectives
To assess the visual performance of multifocal contact lenses (MFCLs) with high addition powers designed for myopia control.

Methods
Twenty-four non-presbyopic adults (mean age 24 years, range 18–36 years) were fitted with soft MFCLs with add powers of +2.0 D (Add2) and +4.0 D (Add4) (RELAX, SwissLens) and single vision lenses (SVCL; Add0) in a counterbalanced order. In this double-masked study, half of the participants were randomly fitted with 3 mm-distance central zone MFCLs while the other half received 4.5 mm-distance central zone MFCLs. Visual acuity was measured at distance (3.0 m) and at near (0.4 m). Central and peripheral contrast sensitivity was evaluated at distance using the Gabor patch test. The area under the logarithmic contrast sensitivity function curve (ALCSF) was calculated and compared between the groups (i.e. different additions powers used).

Results
Near and distance visual acuities were not affected by the lenses, neither Add2 nor Add4, when compared to Add0, however, CZ3 significantly reduced distance visual acuity with Add4 when compared to CZ4.5 (−0.08 logMAR vs. for CZ3 and -0.18 logMAR for CZ4.5, p = 0.013).

MFCLs impaired central ALCSF only when Add2 was used (15.99 logCS for Add2 and 16.36 logCS for SVCLs, p = 0.021). Peripheral ALCSF was statistically lower for both addition powers of the MFCLs when compared to SVCLs (12.70 for Add2 and Add4, 13.73 for SVCLs, p = 0.009). The above effects were the same for both central zones used.

Conclusions
MFCLs with CZ3 diameter and high add power (Add4) slightly reduced distance visual acuity when compared to CZ4.5 but no reduction in this parameter was found with medium add power (Add2). Central contrast sensitivity was impaired only by MFCLs with the lower add power (Add2). Both add powers in the MFCLs reduced peripheral contrast sensitivity to a similar extent.
Original languageEnglish
Pages (from-to)33-39
Number of pages7
JournalContact Lens and Anterior Eye
Volume43
Issue number1
Early online date13 Dec 2019
DOIs
Publication statusPublished - 1 Feb 2020

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Contrast Sensitivity
Contact Lenses
Myopia
Visual Acuity
Lenses
Hydrophilic Contact Lens
Patch Tests
Double-Blind Method
Power (Psychology)

Keywords

  • Contrast sensitivity
  • Multifocal contact lenses
  • Myopia
  • Myopia control
  • Myopia progression

Cite this

Przekoracka, Katarzyna ; Michalak, Krzysztof ; Olszewski, Jan ; Zeri, Fabrizio ; Michalski, Andrzej ; Paluch, Joanna ; Przekoracka-krawczyk, Anna. / Contrast sensitivity and visual acuity in subjects wearing multifocal contact lenses with high additions designed for myopia progression control. In: Contact Lens and Anterior Eye. 2020 ; Vol. 43, No. 1. pp. 33-39.
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title = "Contrast sensitivity and visual acuity in subjects wearing multifocal contact lenses with high additions designed for myopia progression control",
abstract = "ObjectivesTo assess the visual performance of multifocal contact lenses (MFCLs) with high addition powers designed for myopia control.MethodsTwenty-four non-presbyopic adults (mean age 24 years, range 18–36 years) were fitted with soft MFCLs with add powers of +2.0 D (Add2) and +4.0 D (Add4) (RELAX, SwissLens) and single vision lenses (SVCL; Add0) in a counterbalanced order. In this double-masked study, half of the participants were randomly fitted with 3 mm-distance central zone MFCLs while the other half received 4.5 mm-distance central zone MFCLs. Visual acuity was measured at distance (3.0 m) and at near (0.4 m). Central and peripheral contrast sensitivity was evaluated at distance using the Gabor patch test. The area under the logarithmic contrast sensitivity function curve (ALCSF) was calculated and compared between the groups (i.e. different additions powers used).ResultsNear and distance visual acuities were not affected by the lenses, neither Add2 nor Add4, when compared to Add0, however, CZ3 significantly reduced distance visual acuity with Add4 when compared to CZ4.5 (−0.08 logMAR vs. for CZ3 and -0.18 logMAR for CZ4.5, p = 0.013).MFCLs impaired central ALCSF only when Add2 was used (15.99 logCS for Add2 and 16.36 logCS for SVCLs, p = 0.021). Peripheral ALCSF was statistically lower for both addition powers of the MFCLs when compared to SVCLs (12.70 for Add2 and Add4, 13.73 for SVCLs, p = 0.009). The above effects were the same for both central zones used.ConclusionsMFCLs with CZ3 diameter and high add power (Add4) slightly reduced distance visual acuity when compared to CZ4.5 but no reduction in this parameter was found with medium add power (Add2). Central contrast sensitivity was impaired only by MFCLs with the lower add power (Add2). Both add powers in the MFCLs reduced peripheral contrast sensitivity to a similar extent.",
keywords = "Contrast sensitivity, Multifocal contact lenses, Myopia, Myopia control, Myopia progression",
author = "Katarzyna Przekoracka and Krzysztof Michalak and Jan Olszewski and Fabrizio Zeri and Andrzej Michalski and Joanna Paluch and Anna Przekoracka-krawczyk",
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Contrast sensitivity and visual acuity in subjects wearing multifocal contact lenses with high additions designed for myopia progression control. / Przekoracka, Katarzyna; Michalak, Krzysztof; Olszewski, Jan; Zeri, Fabrizio; Michalski, Andrzej; Paluch, Joanna; Przekoracka-krawczyk, Anna.

In: Contact Lens and Anterior Eye, Vol. 43, No. 1, 01.02.2020, p. 33-39.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Contrast sensitivity and visual acuity in subjects wearing multifocal contact lenses with high additions designed for myopia progression control

AU - Przekoracka, Katarzyna

AU - Michalak, Krzysztof

AU - Olszewski, Jan

AU - Zeri, Fabrizio

AU - Michalski, Andrzej

AU - Paluch, Joanna

AU - Przekoracka-krawczyk, Anna

PY - 2020/2/1

Y1 - 2020/2/1

N2 - ObjectivesTo assess the visual performance of multifocal contact lenses (MFCLs) with high addition powers designed for myopia control.MethodsTwenty-four non-presbyopic adults (mean age 24 years, range 18–36 years) were fitted with soft MFCLs with add powers of +2.0 D (Add2) and +4.0 D (Add4) (RELAX, SwissLens) and single vision lenses (SVCL; Add0) in a counterbalanced order. In this double-masked study, half of the participants were randomly fitted with 3 mm-distance central zone MFCLs while the other half received 4.5 mm-distance central zone MFCLs. Visual acuity was measured at distance (3.0 m) and at near (0.4 m). Central and peripheral contrast sensitivity was evaluated at distance using the Gabor patch test. The area under the logarithmic contrast sensitivity function curve (ALCSF) was calculated and compared between the groups (i.e. different additions powers used).ResultsNear and distance visual acuities were not affected by the lenses, neither Add2 nor Add4, when compared to Add0, however, CZ3 significantly reduced distance visual acuity with Add4 when compared to CZ4.5 (−0.08 logMAR vs. for CZ3 and -0.18 logMAR for CZ4.5, p = 0.013).MFCLs impaired central ALCSF only when Add2 was used (15.99 logCS for Add2 and 16.36 logCS for SVCLs, p = 0.021). Peripheral ALCSF was statistically lower for both addition powers of the MFCLs when compared to SVCLs (12.70 for Add2 and Add4, 13.73 for SVCLs, p = 0.009). The above effects were the same for both central zones used.ConclusionsMFCLs with CZ3 diameter and high add power (Add4) slightly reduced distance visual acuity when compared to CZ4.5 but no reduction in this parameter was found with medium add power (Add2). Central contrast sensitivity was impaired only by MFCLs with the lower add power (Add2). Both add powers in the MFCLs reduced peripheral contrast sensitivity to a similar extent.

AB - ObjectivesTo assess the visual performance of multifocal contact lenses (MFCLs) with high addition powers designed for myopia control.MethodsTwenty-four non-presbyopic adults (mean age 24 years, range 18–36 years) were fitted with soft MFCLs with add powers of +2.0 D (Add2) and +4.0 D (Add4) (RELAX, SwissLens) and single vision lenses (SVCL; Add0) in a counterbalanced order. In this double-masked study, half of the participants were randomly fitted with 3 mm-distance central zone MFCLs while the other half received 4.5 mm-distance central zone MFCLs. Visual acuity was measured at distance (3.0 m) and at near (0.4 m). Central and peripheral contrast sensitivity was evaluated at distance using the Gabor patch test. The area under the logarithmic contrast sensitivity function curve (ALCSF) was calculated and compared between the groups (i.e. different additions powers used).ResultsNear and distance visual acuities were not affected by the lenses, neither Add2 nor Add4, when compared to Add0, however, CZ3 significantly reduced distance visual acuity with Add4 when compared to CZ4.5 (−0.08 logMAR vs. for CZ3 and -0.18 logMAR for CZ4.5, p = 0.013).MFCLs impaired central ALCSF only when Add2 was used (15.99 logCS for Add2 and 16.36 logCS for SVCLs, p = 0.021). Peripheral ALCSF was statistically lower for both addition powers of the MFCLs when compared to SVCLs (12.70 for Add2 and Add4, 13.73 for SVCLs, p = 0.009). The above effects were the same for both central zones used.ConclusionsMFCLs with CZ3 diameter and high add power (Add4) slightly reduced distance visual acuity when compared to CZ4.5 but no reduction in this parameter was found with medium add power (Add2). Central contrast sensitivity was impaired only by MFCLs with the lower add power (Add2). Both add powers in the MFCLs reduced peripheral contrast sensitivity to a similar extent.

KW - Contrast sensitivity

KW - Multifocal contact lenses

KW - Myopia

KW - Myopia control

KW - Myopia progression

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U2 - 10.1016/j.clae.2019.12.002

DO - 10.1016/j.clae.2019.12.002

M3 - Article

VL - 43

SP - 33

EP - 39

JO - Contact Lens and Anterior Eye

JF - Contact Lens and Anterior Eye

SN - 1367-0484

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