View clinical trials related to Cataract.
Filter by:In order to better cope with complex situations of cataract surgery, we designed and improved a new set of multi-functional cataract surgery auxiliary devices, including ophthalmic surgery auxiliary hooks, eye retractor hooks and membranous cataract scissors. Their common feature is that they have the function of 2-3 traditional surgical instruments, which can be switched in operations, reducing the replacement of different surgical instruments, lowing the number of surgical instruments in and out of the incision, reducing trauma and improving surgical efficiency. The purpose of this multi-center prospective clinical study is to verify the advantages of this new group of multifunctional devices and further summarize the experience and improvement by comparing the safety and effectiveness of traditional cataract surgical instruments combined with new multifunctional cataract assisted surgical instruments and traditional cataract surgical instruments alone.
Prospective, interventional, non-invasive, monocentric, longitudinal, non-randomized study
The purpose of this study is to report the prevalence data for total corneal astigmatism (TCA) in cataract surgery candidates.
Cataract surgery improves vision and is therefore assumed to improve a person's ability to work and function. Following cataract surgery, most patients do not need glasses to see clearly at distance, but they do require glasses to see clearly up close. If a patient is unable to acquire reading glasses after surgery due to either financial or logistical reasons, their ability to resume work and functioning may be compromised, diminishing the overall benefit to be gained from cataract surgery. Patients in the developing world may be affected disproportionately due to difficulty accessing care postoperatively. In this study, patients receiving cataract surgery at a clinic in Comayagua, Honduras will be randomized to either receive free reading glasses immediately after surgery or four months later. The primary outcome is the proportion of subjects who report that vision interferes with their ability to work. Secondary outcomes will include the number of hours worked each week at productive activities, income level, and visual functioning. The hypotheses are that the patients who receive free reading glasses immediately following surgery will be less likely to report that their vision interferes with their ability to work, they will work at productive activities a greater number of hours each week, their incomes will be higher, and their visual function scores will be higher.
This is a prospective, multi-center, randomized comparative study. The purpose of the study is to evaluate and compare the objective and subjective visual outcomes of different types of functional intraocular lenses (IOLs) in patients.
A silicone sleeve will be used on the hydrodissection needle to avoid that the iris can prolaps through the gap between needle and incision wound.
The goal of this observational study is to learn about the Asqelio monofocal intraocular lens (IOL) model QLIO130C in patients undergoing cataract surgery. The aim of the study is to evaluate the lens implementation safety and efficacy after at least 24 months.
The proposed randomized clinical trial aims to compare visual performance, measured using VR simulations, in cataract patients implanted either with bilateral trifocal IOL or bilateral monofocal IOL with monovision. The hypothesis is that patients implanted with trifocal IOL would exhibit superior visual performance, in both daytime and nighttime conditions, compared to those with a monofocal IOL with monovision.
The goal of this clinical trial is to compare visual quality after cataract surgery between two groups: bilateral monofocal intraocular lenses (IOL) and monofocal and contralateral extended depth-of-focus (EDOF) IOL implantation. The main question it aims to answer is: • does the combination of both monofocal and EDOF IOLs presents an advantage over bilateral monofocal IOL implantation in the daily life of patients undergoing cataract surgery without the disadvantages of bilateral EDOF IOL implantation? Participants will: - be randomised in either bilateral monofocal group or monofocal and EDOF group - undergo visual acuity testing with and without correction at all distances - be asked to complete a quality of vision questionnaire - undergo non-invasive examinations to measure residual astigmatism, contrast sensitivity, straylight, optical aberrations, reading spead.
Dr. Lisa A. Hark (PI and Study Chair) and an interdisciplinary team have designed the New York City Eye Study (NYCES) to promote eye and vision health equity and address eye health disparities in adults age 21+ (PAR-23-009/NOT-EY-22-004).