Active clinical trials for "Aphakia"

The purpose of this study is to evaluate the safety and effectiveness of an investigational IOL.

The purpose of this study is to evaluate the clinical outcomes of an investigational IOL in patients undergoing cataract extraction and intraocular lens implantation using an improved injector system.

Cataract is the leading cause of blindness globally and cataract surgery with the implantation of intraocular lens (IOL) is the most commonly performed operation worldwide. After removal of the cataract, an IOL is usually implanted within the capsular bag. However, endocapsular implantation of IOL is not always feasible due to inadequate zonular or capsular support, intraoperative posterior capsule rupture, or in primary intracapsular cataract extraction. Predisposing factors including prior ocular trauma, intravitreal injection or intraocular surgery, co-existing ocular comorbidities like chronic uveitis, pseudoexfoliation syndrome, may increase the risk of failure of in-the-bag implantation. In such situation, the surgeons may consider implanting the IOL in the anterior chamber, ciliary sulcus, or using fixation techniques. In Asian eyes, the anterior chambers are often shallow and placement in anterior chamber may accelerate corneal endothelial cell loss leading to corneal decompensation, or worsen pre-existing glaucoma. Placement in the ciliary sulcus depends on the amount and integrity of the capsular remnant, and inadequate support may result in dislocation of the IOL. In recent years, newer forms of scleral fixation of IOL using glue or glue-less approach, although these procedure appeared to be simpler, the long-term stability of these IOL have not been evaluated against conventional approach with suture fixation. The main limitations of suture fixation technique are related to the sutures either intraoperatively (e.g. entanglement, failure to rotate and bury the suture knot) or postoperatively (breakage, dissolution of suture with time), and the learning curve required for surgeons in training. Our study aims to study the efficacy and safety of a modified technique of scleral fixation of an intraocular lens in the posterior chamber.

Hypothesis: Holladay 2 formula is still accurate even used without lens thickness data.

The purpose of this clinical study is to assess the repeatability of objective refraction using auto refraction on subjects bilaterally implanted (implanted in both eyes) with the Fluid Accommodating IOL (FAIOL).

The primary purpose of this comparative clinical study is to collect clinical data to demonstrate the equivalence of the investigational device to the predicate device for measurements of the eye. The secondary purpose is to evaluate any adverse events that occur during the clinical study.

The purpose of this study is to evaluate the intraocular stability and safety of secondary iris-fixated IOLs in aphakic patients.

A multi-centre non-randomized clinical investigation to assess multifocal visual outcomes using different near additions, for the treatment of aphakia after cataract removal.

The study is designed as a post market evaluation of the Softec HP1 IOL for continuance of the CE certificate. The primary effectiveness endpoint is to evaluate the safety and performance levels produced by this IOL in patients requiring standard cataract surgery. There will be no change from standard procedure, other than 1 extra post op evaluation.

The purpose of this study is to provide real world evidence (RWE) on the performance of the Clareon ultraviolet absorbing (UVA) intraocular lenses (IOLs) to support the overall body of evidence on the Clareon IOL family.