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Analyzed the Visual Effect of an Improved Multifocal Contact Lens to Correct Presbyopia |
Minfeng Chen, Chuan Lin, Wenfeng Wu, Ruijing Xia, Xinjie Mao, Jia Qu |
Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China |
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Guide |
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Abstract Objective: To analyze the visual effect of an improved multifocal contact lens fitting method to correct
presbyopia. Methods: A prospective analysis was performed on 20 presbyopia participants (Add: +1.00 D-
+2.00 D) who met the criteria from January to December 2018 in Eye Hospital, Wenzhou Medical
University. Three methods for them to correct presbyopia, included multifocal method (both eyes wearing
multifocal soft lens), single visual method (one eye wearing single visual soft lens for distance, one eye
wearing single visual soft lens for near) and improved multifocal method (single visual soft lens for the
dominant eye, multifocal soft lens for the non-dominant eye). Each correction method would be used for
1 week and there would be 1 week between each method to stop wearing the lens as the washout period.
Analyzed the binocular correct vision of these 20 participants among these 3 correct methods, and use
VFQ-25 Chinese version of the visual quality table to evaluate the visual effect for these 3 correct methods.
ANOVA was used to analysis the difference of binocular correct vision among these correct methods.
Results: The binocular correct vision of multifocal method was statistical lower than the single visual
spectacle (t=3.91, P=0.001) and improved multifocal method (t=2.94, P=0.008) of distance correct vision.
Different contrast of binocular correct vision at 50 cm of these three 3 correct methods were all higher
than single visual spectacle, included the same binocular correct of multifocal method (100%: t=-4.76,
P<0.001; 10%: t=-4.22, P<0.001), improved multifocal method (100%: t=-4.22, P<0.001; 10%:
t=-3.90, P=0.001) and single visual method (100%: t=-3.50, P=0.002; 10%: t=-4.76, P<0.001). And
different contrast of binocular correct vision at 30 cm of these three 3 correct methods were also higher than
single visual spectacle, included the same binocular correct of multifocal method (100%: t=-4.36, P<0.001;
10%: t=-5.48, P<0.001), improved multifocal method (100%: t=-5.67, P<0.001; 10%: t=-3.93, P=0.001)
and single visual method (100%: t=-7.43, P<0.001; 10%; t=-4.03, P=0.001). In all subjects there were 1
subject considered the single visual spectacle was the best, 7 participants felt the multifocal method was
the best, 2 subjects chose single visual method and 10 participants liked the improved multifocal method.
Conclusion: The improved multifocal method which combined multifocal method and single visual method
could achieve a good presbyopia correction effect, the binocular vision and visual quality of multifocal
method was not weak of other two methods, and this method was easier to be accepted by participants.
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Received: 14 May 2021
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Fund: |
Corresponding Authors:
Jia Qu, Eye Hospital, Wenzhou Medical University, 325027, China (Email:1386898805@163.com)
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