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Soft Multifocal Contact Lenses for Myopia Control in Children

Korsan, Jenna M
http://orcid.org/0000-0002-9879-7657
http://rave.ohiolink.edu/etdc/view?acc_num=osu1429012620

Abstract Details

2015, Master of Science, Ohio State University, Vision Science.
Myopia has become a public health problem, affecting nearly one-third of people in the United States. There have been many proposed mechanisms of myopia control, including atropine, undercorrection, corneal reshaping therapy, progressive addition lenses, and soft bifocal contact lenses. Soft bifocal contact lenses are thought to decrease the progression of myopia through peripheral defocus created by the contact lenses. There is currently only peer-reviewed literature on myopia control with center distance soft bifocal contact lenses, so it is unknown whether center near soft bifocal contact lenses slow the progression of myopia. The purpose of this study was to determine if center near multifocal contact lenses (Biofinity “N”) provide comparable vision to center distance multifocal contact lenses (Biofinity “D”), as well as to determine if they provide as much peripheral myopic defocus as the center distance lenses in children aged 8 to 14 years. Both subjective and objective vision was measured while the subject was wearing each type of lens. Peripheral defocus in 4 positions of gaze (central, 10° nasal, 20° nasal, 30° nasal) was measured post-dilation using an autorefractor. It was found that center distance contact lenses provide better overall subjective vision than center near (9.0 /10.0 vs. 6.5/10.0, Wilcoxon rank sum p<0.019), as well as significantly better subjective near vision (9.0/10.0 vs. 6.5/10.0, Wilcoxon rank sum p<0.009). Center distance contact lenses also provided better logMAR high contrast distance acuity (+0.02 vs. +0.14, Wilcoxon rank sum p<0.004), low contrast distance acuity (+0.17 vs. +0.43, Wilcoxon iii rank sum p<0.001), and high contrast near acuity (-0.09 vs. +0.05, Wilcoxon rank sum p<0.023). There was no statistically significant difference between subjective distance vision for center distance (9.0/10.0) and center near contact lenses (6.5/10.0, Wilcoxon rank sum p<0.063). Comfort of the center distance (10.0/10.0) and center near (9.5/10.0) lenses was also not significantly different (Wilcoxon rank sum p<0.579). The center distance contact lenses provided more peripheral myopic defocus at 30° nasal gaze only (-0.84 vs. 0.07, Wilcoxon rank sum p<0.004). With the exception of 30° nasal gaze in the center near lenses, both types of contact lenses provided peripheral myopic defocus. Although center near multifocal contact lenses may provide enough peripheral defocus to decrease the progression of myopia, they would not improve vision or decrease myopia progression more than the center distance contact lenses already found to be effective for myopia control.
Jeffrey Walline, OD PhD (Advisor)
Donald Mutti, OD PhD (Committee Member)
Nicky Lai, OD MS (Committee Member)
49 p.
Ophthalmology
myopia; contact lens; bifocal; soft

Recommended Citations

Citations

  • Korsan, J. M. (2015). Soft Multifocal Contact Lenses for Myopia Control in Children [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429012620

    APA Style (7th edition)

  • Korsan, Jenna. Soft Multifocal Contact Lenses for Myopia Control in Children. 2015. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1429012620.

    MLA Style (8th edition)

  • Korsan, Jenna. "Soft Multifocal Contact Lenses for Myopia Control in Children." Master's thesis, Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429012620

    Chicago Manual of Style (17th edition)

osu1429012620
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