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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT05255796
Other study ID # 20211213CTR
Secondary ID
Status Recruiting
Phase N/A
First received
Last updated
Start date January 7, 2022
Est. completion date December 2022

Study information

Verified date February 2022
Source Wenzhou Medical University
Contact Pingjun Chang
Phone 18868410303
Email 364669877@qq.com
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The IOL-capsular complex is formed after cataract surgery and intraocular lens (IOL) implantation. Early postoperative mechanical wrapping of the anterior and posterior capsules plays a significant role in preventing IOL decentration and tilt, as well as formation of the IOL-capsular complex which reduces the incidence of posterior cataract opacity. IOL decentration ≥ 0.4 mm or/and IOL tilt ≥7degree were considered clinically significant cause of poor post-surgery visual quality especially for optical sophisticated IOLs. This negative impact does not affect various types of IOLs equally. Several studies indicated that AL was an independent risk factor of IOL decentration and tilt for emmetropic or moderate myopic eyes. For patients with high myopia, they often have a longer axial length and a larger capsule diameter, which reduces the rotational stability of the IOL and may lead to tilt, decentration and displacement of IOL. Currently, there is no literature guidance to compare the results of cataract surgery combined various types of IOLs implantation in patients with high myopia. The novel anterior segment optical coherence tomography (AS-OCT) device, CASIA2 can evaluate the IOL capsule bending and the lens position after cataract surgery. Also, CASIA2 can be used to documented the dynamic changes of IOL-capsular complex after surgery.


Description:

The IOL-capsular complex is formed after cataract surgery and intraocular lens (IOL) implantation. Early postoperative mechanical wrapping of the anterior and posterior capsules plays a significant role in preventing IOL decentration and tilt, as well as formation of the IOL-capsular complex which reduces the incidence of posterior cataract opacity. Although up to 2-3 degree tilt and a 0.2-0.3 mm decentration are common and clinically unnoticed for any design of IOL, larger extent of tilt and decentration has a negative impact on the optical performance. IOL decentration ≥ 0.4 mm or/and IOL tilt ≥7degree were considered clinically significant cause of poor post-surgery visual quality especially for optical sophisticated IOLs. This negative impact does not affect various types of IOLs equally. Several studies indicated that AL was an independent risk factor of IOL decentration and tilt for emmetropic or moderate myopic eyes. However, there is scarce evidence on characteristics and factors associated with clinically significant IOL decentration and tilt in highly myopic eyes. For patients with high myopia, they often have a longer axial length and a larger capsule diameter, which reduces the rotational stability of the IOL and may lead to tilt, decentration and displacement of IOL. Currently, there is no literature guidance to compare the results of cataract surgery combined various types of IOLs implantation in patients with high myopia. The novel anterior segment optical coherence tomography (AS-OCT) device, CASIA2 can evaluate the IOL capsule bending and the lens position after cataract surgery. Also, CASIA2 can be used to documented the dynamic changes of IOL-capsular complex after surgery.


Recruitment information / eligibility

Status Recruiting
Enrollment 40
Est. completion date December 2022
Est. primary completion date August 2022
Accepts healthy volunteers No
Gender All
Age group 18 Years to 90 Years
Eligibility Inclusion Criteria: - The patients are diagnosed age related cataract or complicated cataract with axial length over 26mm - The patients' age over 18 years old - The patients plan to receive cataract surgery in Eye hospital of Wenzhou Medical University - The dialated pupils are over 6mm - Patients are willing and able to complete the follow-ups Exclusion Criteria: - Patients with other types of cataract - Patients have complications in the surgery and after surgery - Patients have other severe diseases of eyes

Study Design


Related Conditions & MeSH terms


Intervention

Procedure:
one-piece
Patients underwent phacoemulsification cataract surgery with one-piece IOL implantation.
plate-haptic
Patients underwent phacoemulsification cataract surgery with plate-haptic IOL implantation.

Locations

Country Name City State
China Eye Hospital of Wenzhou Medical College Hangzhou Zhejiang

Sponsors (1)

Lead Sponsor Collaborator
Wenzhou Medical University

Country where clinical trial is conducted

China, 

Outcome

Type Measure Description Time frame Safety issue
Primary The position of IOL Evaluation of the position of IOL through tilt, decentration and the process of capsule bending using CASIA2. The 1st day after surgery
Primary The position of IOL Evaluation of the position of IOL through tilt, decentration and the process of capsule bending using CASIA2. The 1st week after surgery
Primary The position of IOL Evaluation of the position of IOL through tilt, decentration and the process of capsule bending using CASIA2. The 1st month after surgery
Primary The position of IOL Evaluation of the position of IOL through tilt, decentration and the process of capsule bending using CASIA2. The 3rd month after surgery
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