Safety and Efficacy of a Novel Hydrophobic Acrylic IOL - iPure: a Randomised Study

Not Applicable

Completed

• Conditions: Cataract
• Interventions: Device: Cataract surgery

• Registration Number: NCT04329754
• Lead Sponsor: Vienna Institute for Research in Ocular Surgery

Brief Summary

In this study the rotational stability and performance - with respect to glistening and PCO formation - of a new hydrophobic acrylic IOL (IPure, PhysIOL, Belgium) will be compared to a gold standard IOL (AMO ZCB00) in a randomized controlled fashion. Fifty eyes of 50 patients will be included. 25 patients will receive the iPure and 25 patients will receive the standard IOL. Study hypothesis: The iPure IOL shows better rotational stability compared to the standard IOL. A clinically relevant difference for rotational stability is defined as 2°.

Detailed Description

Although there may be no direct benefit to the subjects under study, the investigation will assess the stability which determines the efficacy for future toric optics and the amount of glistening and PCO formation of the IPure and ZCB00 hydrophobic acrylic IOLs.

25 eyes of 25 patients will be recruited for each IOL, that is 50 eyes of 50 patients. The randomization will be done with a binomial law. The IOL have a priori the same IOL constants which eliminates the necessity to know which IOL is going to be implanted at the preoperative time. A clinically relevant difference for rotational stability will be 2°. The reasonable standard deviation of the position of an IOL in the eye is 2.4°. A total of 48 patients is necessary for a probability of 80% to measure a clinically relevant difference concerning the IOL stability.

In the week before surgery, the eye to be operated is examined at the slit-lamp and by indirect fundoscopy and measurement of intraocular pressure (IOP) will be performed routinely. Additionally, routine biometry is performed using the IOLMaster (Zeiss Meditec AG, Jena, Germany) for axial length measurement, K-readings and anterior chamber depth (ACD) measurements.

Randomisation will be performed using online randomisation and patients will be allocated 1:1 either to the study group (iPure group), or to the control group (ZCB00).

A self sealing incision, injection of viscoelastic substance, capsulorhexis, phacoemulsification, irrigation/aspiration of cortical material and injection of viscoelastic substance into the capsular bag are performed in a standardised fashion. The IOL is implanted via injector into the capsular bag. Following the implantation of the IOL, the viscoelastic substance is aspirated thoroughly from the anterior chamber, as well as retro-lentally, to assure complete removal of the OVD.

Any deviation from the standard protocol will be recorded peroperatively. Follow-ups will be performed 1-2 hours, 1 month, 12 months and 24 months after cataract surgery.

Study Timeline

• Study Start: 2012-04
• Study First Submitted: 2013-01-25
• Primary Completion: 2015-02
• Study Completion: 2015-02
• Study First Submitted QC: 2020-03-30
• Study First Posted: 2020-04-01
• Status Verified: 2022-10
• Last Update Submitted: 2022-10-12
• Last Update Posted: 2022-10-17

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 55

Inclusion Criteria

• Age-related cataract
• Age 21 and older
• Visual Acuity > 0.05
• Normal findings in the medical history and physical examination unless the investigator considers an abnormality to be clinically irrelevant.

Exclusion Criteria

• Relevant other ophthalmic diseases such as pseudoexfoliation syndrome, floppy iris syndrome, corneal pathologies
• Previous ocular surgery or trauma.
• Pregnancy (pregnancy test will be taken pre-operatively in women of reproductive age)

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
iPure	Cataract surgery	A new single-piece hydrophobic acrylic IOL (IPure IOL). The study IOL is a one-piece aspheric acrylic hydrophobic glistening-free lens, with a 4.9% water content, a 360 square posterior edge design, and a 5 haptic angulation, providing UV and blue-light filtration. Patient were allocated into two groups. The study group received the iPure lens while the control group received Tecnis ZCB00. Randomisation was done with a binomial law, using random.org. The surgeon was masked to IOL allocation until shortly before implantation. Examiners were masked to IOL allocation.
ZCB00	Cataract surgery	A standard IOL (ZCB00).The control IOL, is a one-piece hydrophobic acrylic IOL with a biconvex aspheric optic and 360 continuous square posterior optic edge with a UV filter and an offset, stepped haptic design. Patient were allocated into two groups. The study group received the iPure lens while the control group received Tecnis ZCB00. Randomisation was done with a binomial law, using random.org. The surgeon was masked to IOL allocation until shortly before implantation. Examiners were masked to IOL allocation.

Primary Outcome Measures

Name	Time	Method
Rotational Stability	2 years	measured using the Purkinje meter (Murcia University) and retroillumination images (degrees of rotation)

Secondary Outcome Measures

Name	Time	Method
Tilt in degrees	2 years	measured by Purkinjemeter
visual acuity	2 years	assessed by ETDRS charts at 4m
Decentration in mm	2 years	measured by Purkinjemeter
Anterior chamber depth	2 years	assessed by AC Master (in mm)
Glistening	2 years	subjective measurement (0 to 4, 0 no glistening, 4 sever glistening)
Capsulorhexis area	2 years	assessed by retroillumination images
PCO	2 years	scored with AQUA (0 to 10, 0 no PCO, 10 sever PCO) and the number of Nd:YAG capsulotomies

Trial Locations

Locations (1)

Vienna Institute for Research in Ocular Surgery (VIROS), Hanusch Hospital Vienna; 🇦🇹 Vienna, Austria