Long-term Evaluation of Single-piece ACrysof IOL Implantation on Development of Posterior Capsule Opacification

Study Overview
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Brief Summary
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Although contemporary cataract surgery has made tremendous strides in technological advancement, posterior capsular opacification (PCO) is still the most frequent long-term complication leading to decreased visual functions and thereby dissatisfying results. A great deal of effort has been made to develop new ways to prevent the formation of PCO. A key factor, widely discussed in literature, is the material and design of the intraocular lense (IOL) edge that can lead to PCO prevention. It is still not clear whether the sharp-edged IOL produces less PCO because of its optic geometry alone or whether the biomaterial contributes to the inhibition of PCO. With the clinical introduction of the single-piece acrylic hydrophobic IOLs with some optic and haptic design differences compared with three-piece acrylic hydrophobic IOLs, it has become possible to determine the influence of IOL material and design on PCO prevention. It is well established that the development of PCO is a dynamic process and that a longer follow-up time is correlated with a higher degree of PCO. So far, there have been prospective clinical studies on the clinical results of single and three-piece acrylic hydrophobic foldable IOLs. However, the question as to as to whether the PCO further increases or becomes stable or regresses on a long-term basis has not yet been answered. Since there is paucity of available literature that prospectively evaluates the development of PCO with the implantation of the single-piece SN60AT hydrophobic acrylic IOL on a long-term basis, the investigators decided to observe the degree of development of PCO at 5 years after cataract surgery.

Official Title
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A Long-term Evaluation of Single-piece Hydrophobic Acrylic Intraocular Lens Implantation on the Development of Posterior Capsule Opacification

Conditions
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Posterior Capsule Opacification After Phacoemulsification and IOL Implantation

Intervention / Treatment
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* Procedure: Cataract surgery with IOL implantation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients with uncomplicated age-related cataract who were otherwise healthy Exclusion Criteria: a history of diabetes mellitus (DM), patients with glaucoma, high myopia (axial length > 27.0 mm), pseudoexfoliation, traumatic cataract, subluxated cataract, previous ocular surgeries, and allergy to dilating drops.

Ages Eligible for Study
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Minimum Age: 40 Years
Maximum Age: 75 Years

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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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Patients undergoing phacoemulsification<br>Patients undergoing phacoemulsification for age-related cataract with implantation of a single-piece Acrysof IOL (SN60AT) | Procedure: Cataract surgery with IOL implantation<br>* Phacoemulsification with implantation of single piece Acrysof IOL<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Posterior Capsule Opacification | Evaluation of PCO (EPCO) scores in the area of the intraocular lens (IOL) optic and in the central 3mm zone at 5 years after surgery | 5 years followup | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| EPCO Score and EPCO area with total on and part on anterior capsulorhexis cover over optic |  | 5 years postoperatively |