Last updated on March 2017

Precisight Intraocular Lens Implantation for Cataract Treatment


Brief description of study

The purpose of this study is to determine the refractive outcomes and optimize the clinical features of a new intraocular lens intended to treat the senile cataract.

Detailed Study Description

InfiniteVision Optics has developed a new IOL system, the Precisight IOL. This IOL consists of a combination of two lenses: a base lens which is placed permanently into the capsular bag, and a front lens which sits on top of the base lens outside the capsular bag. The major advantage of this system is the adjustability of the primary IOL implantation which is done by front lens exchange. In case of either postoperative refractive adjustments or patient dissatisfaction with the visual performance, the front lens can be easily exchange by a less invasive surgery, avoiding a total IOL explantation. The implantation of the Precisight IOL is similar to the implantation of a traditional intraocular lens with no expected additional risk. For all new IOLs, the IOL-constants are determined and provided by the manufacturer. They are calculated on the basis of eye models and clinical testing. In this study the biometric data of each patient's eye will be documented together with the implanted lens power and the postoperative stable refraction for calculation of the optimized IOL-constants. In the present study, 125 subjects will be enrolled. Patients with a deviation from target refraction of more than 0.5 D spherical equivalent at the 2-3 month follow-up visit will undergo a secondary intervention for exchange of the front lens. These patients will be followed up for 1 year after front lens exchange. Subjects will be screened during a pre-operative visit. Before the surgery visit, the subjected must have signed the Informed Consent Form. After the surgery, patients will be followed up for one year. The visits will be scheduled at 1 day, 7-14 days, 2-3 months and 5-7 months and 1 year after surgery. Patients who underwent a surgery to exchange the front lens will be also followed up 1 day, 7-14 days, 2-3 months and 5-7 months and 1 year after the exchange surgery. Investigator site staff will document the data in electronic Case Report Forms (eCRF). The data will be pseudonymized, i.e. only the year of birth and a code will be entered in the eCRF. Adverse events will be recorded in an eCRFs. Unexpected and serious adverse events are to be reported to the manufacturer. Data cleaning will be done one month after last patient out and study report finished three months after last patient out. Subjects must be withdrawn from the study (i) at their own request, (ii) in case of intraoperative complication impacting the safety of the patient or (iii) in case of any postoperative complication if the continuation of the study has an impact on the safety of the patient. The study may terminate before completion if a high relative number of individual subject withdrawals due to the patient's requests and/or clinically relevant complications are observed. The IRB will be informed in due course accordingly. The findings of this study will be published by the investigators in a scientific journal and presented at scientific meetings.

Clinical Study Identifier: NCT02970487

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Betty Chon

Peregrine Eye and Laser Institue
Makati, Philippines
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