In this study, the investigators examined the subjective visual quality including LogMAR uncorrected distance visual acuity (UCDVA), best corrected distance visual acuity (BCDVA),uncorrected intermediate visual acuity (UCIVA), distance corrected intermediate visual acuity (DCIVA), uncorrected near visual acuity (UCNVA) ,distance corrected near visual acuity (DCNVA),using logMAR visual acuity chart,and the objective visual quality including Modulation Transfer Function (MTF), Strehl ratio(SR), objective scatter index (OSI), OQAS value (OV),and the tear-film quality dynamics including the tear break-up time and the tear-film OSI between the eyes with multifocal lens and monofocal lenses by optical quality analysis system (OQAS).
50 eyes of 50 cataract patients scheduled for phacoemulsification surgery were recruited, the multifocal group (25 eyes) ，were implantation with Tecnis® ZMB00；and the monofocal group (25 eyes) were implantation with Tecnis® ZCB00. Methods: All eyes were examined by logMAR visual acuity chart and Optical quality analysis system (OQAS) at 1 week, 1 month, 3 month, 6 month,12 month after surgery for the subjective and objective visual quality Change during the first year. Measures:Subjective and objective visual quality were evaluated.Tear-film quality dynamicswere evaluated.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
50
Diffractive IOLs are a type of multifocal (bifocal) IOL that are based on the Huygens-Fresnel principle. Specifically, a diffractive IOL has concentric rings in its posterior surface that form 2 primary focal points independent of pupil size. This optical behavior of the IOL can effectively restore far and near vision. However, it can also cause side effects, such as halos and glare and loss of contrast sensitivity.
Wenzhou Medical University
Wenzhou, Zhejiang, China
RECRUITINGTo evaluate the Visual Quality Change of Eyes Implanted With Diffractive Multifocal Intraocular Lens
Visual quality change during the first year after cataract surgery. The visual quality including the subjective and objective visual quality. The subjective visual quality including LogMAR uncorrected distance visual acuity (UCDVA), best corrected distance visual acuity (BCDVA),uncorrected intermediate visual acuity (UCIVA), distance corrected intermediate visual acuity (DCIVA), uncorrected near visual acuity (UCNVA) and distance corrected near visual acuity (DCNVA). The objective visual quality including Modulation Transfer Function (MTF), Strehl ratio(SR), objective scatter index (OSI) and OQAS value (OV).
Time frame: 1week, 1month, 3month,6month,12month
To evaluate the Tear-film Quality Dynamics of Eyes Implanted With Diffractive Multifocal Intraocular Lens
The tear-film quality dynamics including the tear break-up time and the tear-film OSI were examined by optical quality analysis system (OQAS)
Time frame: 1week, 1month, 3month,6month,12month
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