Active clinical trials for "Cataract"

The objective of the study is to evaluate the safety and performance of the enVista trifocal intraocular lens when implanted in the capsular bag.

Digital 3D microscopes require less light and may be more comfortable for patients requiring cataract surgery under topical anesthesia compared to conventional microscopes. To date, no studies have evaluated the comfort and subjective visual sensations related to the light of the 3D digital microscope in cataract surgery patients. The purpose of this study is to evaluate the effectiveness of the Ngenuity 3D digital operating system (Alcon, Fort Worth, TX) compared to conventional microscopes on the comfort and subjective visual sensations related to of patients undergoing initial cataract surgery under topical anesthesia (pure or combined with intravenous sedation).

The purpose of this study is to examine the effect of Cequa treatment on the accuracy of pre-operative biometry and on corneal higher-order aberrations (HOAs) in cataract patients who have signs of dry eye disease.

Brief Summary: Age-related cataract is the main cause of impaired vision in the elderly population worldwide. In the UK, more than half of people who are over 65 years old have some cataract development in one or both eyes. The only treatment that can restore functional visual ability is cataract surgery where the opacified crystalline lens is removed by phacoemulsification and an artificial intraocular lens is implanted. It is estimated that around 10 million cataract operations are performed around the world each year. Cataract operations are generally very successful, with a low risk of serious complications. During the past two decades, cataract surgery underwent tremendous change and modernisation resulting in today's small incision phacoemulsification surgery and a safe technique with a short rehabilitation time for the patient. Traditional spherical monofocal intraocular lenses (IOLs) restore best-corrected vision and may lessen the need for spectacles. These IOLs correct only the spherical portion of the total refractive error and do not correct corneal astigmatism. Astigmatism is a visually disabling refractive error affecting the general population, especially those with cataract. At least 15% to 20% of cataract patients have 1.5 diopters (D) or more of corneal or refractive astigmatism. With increased patient expectations, the trend is not only to remove the cataract but also to address the problem of pre-existing astigmatism at the time of surgery. Surgical-induced astigmatism can be reduced by smaller incisions, i.e. microincision cataract surgery (MICS), which by definition is surgery performed through incisions smaller than 2.0 mm, reducing the need for suturing. This results in better corneal optical quality, thus improving visual outcomes. There are also other surgical options to correct preexisting astigmatism during cataract surgery like: selectively positioning of the phacoemulsification incision; astigmatic keratotomy with corneal or limbal relaxing incisions; excimer laser refractive procedures such as photorefractive keratectomy, laser in situ keratomileusis, and laser-assisted subepithelial keratectomy; or implanting pseudophakic toric posterior chamber intraocular lenses (IOLs). Toric IOLs have been shown to result in good visual and refractive outcomes. Combined with MICS, these IOLs can allow effective correction of cylindrical errors intraoperatively, improving visual quality and thus leading to spectacle independence. Plate haptic and loop haptic toric IOLs have been considered for about a decade but have been associated with postoperative rotational instability. Rotation of a toric lens from its intended orientation degrades its corrective power, with approximately 3.3% loss of cylindrical power for every degree off axis. A misorientation of approximately 30° negates the effectiveness of astigmatic correction, and a misorientation of more than 30° may induce additional astigmatism. Although some patients are asymptomatic despite induced astigmatism, others experience symptoms such as blurred or distorted vision, headache, fatigue, eyestrain, squinting, or eye discomfort. Thus, IOL orientation stability is an essential goal in toric IOL design. RATIONALE The purpose of this study is to assess and compare the axial IOL rotation and optical quality (refraction, visual acuity, decentration and tilt) and capsular bag reaction after micro-incision surgery with an IOL implantation in cataract patients - Acrysof SN60WF, Tecnis ZCB00 & Envista MX60 IOL

This is an efficacy study of Bromfenac Ophthalmic Solution in cataract surgery.

Evaluation of intraocular pressure (IOP) lowering effect of one iStent versus two iStents in conjunction with cataract surgery in subjects with primary open-angle glaucoma, washed out of one anti-glaucoma medication prior to stent implantation.

The objective of this clinical trial is to evaluate the safety and effectiveness of the Bausch + Lomb Toric Accommodating Posterior Chamber Silicone Intraocular Lens used to provide near, intermediate, and distance vision and a reduction of the effects of preoperative corneal astigmatism in presbyopic patients undergoing cataract extraction and intraocular lens (IOL) placement.

The purpose of this study is to document the safety and efficacy of primary IOL implantation in children below 2 years of age undergoing congenital cataract surgery.

Is the primary objective of this investigation to compare the clinical efficacy of the drug test - Ster ® (prednisolone 1% ophthalmic suspension - Union Chemicals) in the comparator - Fort ® Pred (prednisolone 1% ophthalmic suspension - Allergan) in the control of postoperative inflammation in cataract surgery by phacoemulsification through periodic measurement of efficiency scores (number of cells in the anterior chamber, the presence of fibrin in the anterior chamber, conjunctival hyperemia, corneal edema and Descemet folds).

The purpose of the study is to determine where a sustained steroid delivery system (Ozurdex,Allergan) is safe and effective to treat Cystoid Macular Edema in diabetic patients after Cataract Surgery