Anterior Capsule Polishing Effect on Effective Lens Position

Study Overview
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Brief Summary
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The purpose of this study is to evaluate effects of anterior capsule polishing on effective lens position (ELP) and actual axial movement of the intraocular lens (IOL) by measuring anterior chamber depth (ACD) patients with bilateral age-related cataract undergo bilateral uneventful cataract surgeries with in-the- bag implantation of a single-piece hydrophobic acrylic foldable IOL (SN60WF). The anterior capsule was extensively polished using Whitman Shepherd Double-Ended Capsule Polisher in one eye randomly, and the other not. The ACD was measured 1day, 1 week, 1month, 3 months and 6 months with anterior segment Optical Coherence Tomograph (AS-OCT) postoperatively. The actual axial movement of IOL was defined as the root mean square (RMS) of the change in ELP at each visit.

Official Title
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Effect of Anterior Capsule Polishing on Effective Lens Position After Cataract Surgery

Conditions
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Cataract

Intervention / Treatment
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* Procedure: anterior capsule polishing


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: bilateral age-related cataract good overall physical constitution uneventful surgeries of both eyes with in-the-bag IOL implantation Exclusion Criteria: history of intraocular surgery or laser therapy history of ocular trauma or ocular disease high myopia diabetes severe retinal pathology patients who could not return on time
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Supportive Care
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: cataract<br> | Procedure: anterior capsule polishing<br>* polish the anterior capsule and the equator of capsule extensively with a Whitman Shepherd Double-Ended Capsule Polisher<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Effective Lens Position | Effective lens position was measured with anterior chamber depth 1 day，1 week, 1 month as well as 3 months and 6 months postoperatively using anterior segment Optical Coherence Tomograph. The anterior chamber depth defined as the distance between the posterior surface of the corneal and anterior surface of intraocular lens in the pupil center along the optical axis. The actual movement of intraocular lenses was defined as the root mean square of changes in the effective lens position at each visit. | 1 day，1 week, 1 month，3 months and 6 months postoperatively | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Uncorrected Visual Acuity(UCVA) | The UCVA was recorded in logMAR units at each vist | 1 day，1 week, 1 month as well as 3 months and 6 months postoperatively | 
| Refractive Error | auto refraction was performed at each visit. Spherical equivalent refraction (SER) (sphere +cylinder/2) was used in subsequent calculations. | 1 day，1 week, 1 month as well as 3 months and 6 months postoperatively | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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age related cataract, phacoemulsification, anterior capsule polishing, optical coherence tomography, anterior chamber depth