Active clinical trials for "Cataract"

On the day of surgery, the first eye to be operated is randomised to receive a Vivinex , HOYA Surgical Optics GmbH or an SN60WF, Alcon, Fort Worth, Texas. The second eye to be operated receives the other IOL type. A complete biomicroscopic examination, visual acuity testing using autorefractometer, contrast sensitivity testing, and standardised retroillumination photography for PCO evaluation, will be performed 6 month (30-60 days), 1.5 years (± 3 months) and 3 (± 3 months) years postoperatively.

Primary objective of the study is the assessment of the patients' discomfort following cataract extraction surgery by means of phacoemulsification and intraocular lens implantation.

This prospective, non-randomized controlled study aiming at comparing the prognosis of minimal invasive lens surgery and traditional cataract surgery for treating congenital cataracts after the patient receives secondary intraocular artificial lens (IOL) implantation.

This study will measure the dynamic real-time intraocular pressure (IOP) in the anterior chamber during standard phacoemulsification surgery. What is known: Fluidics control is determined to be one of the primary drivers of physician decision making in choosing phacoemulsification equipment. Active pressure system fluidic control has a perceived and possibly real (based upon recent literature) improvement in intra-cameral IOP stability and reduced pressure fluctuations. Improved fluidics can allow for reduced dynamic IOP fluctuations, in-the-bag positioned phaco tip, and intra-cameral fluid flow all of which will likely improve corneal health post-operatively.

The purpose of this study is to compare and evaluate the clinical outcomes of 6 kinds of Multifocal Intraocular Lenses: SN6AD1, SBL-3, LS-313 MF30, AT LISA tri 839 MP, ART, LS-313 MF30T.

Prior to cataract surgery the lens must be calculated to appropriately fit a patient for the intraocular lens implant. Lenstar is an optical biometer that calculates the axial length, keratometry, lens thickness, pupillometry, and anterior chamber depth. Dilation drops are routinely used in eye exams in addition to pre-cataract surgery. The dilation drops include Tropicamide 1%, and Phenylephrine 2.5%. The Tropicamide achieves the dilation of the pupil which causes an anterior rotation of the ciliary body, which may affect the Lenstar measurements. This study is to determine if dilating medications affect the lens power prediction for emmetropia by the Lenstar biometer. Prior to dilation, Lenstar biometry will be performed on each eye. Patients will receive dilation medication and after waiting 20 minutes Lenstar biometry will be performed on each eye. Dilation and measurement with Lenstar will be done as standard of care. Measurements and calculations from before and after will be compared.

This prospective, randomized, clinical trial looks to compare children undergoing congenital cataract surgery with intraocular lens (IOL) implantation in terms of visual axis obscuration as well as postoperative complications such as glaucoma, inflammation and IOL centration when IOL fixation is performed using two different techniques : 1) conventional in the bag IOL implantation with anterior vitrectomy, and, 2) posterior optic capture of the IOL through the posterior capsulorhexis without any vitrectomy. 61 eyes of 61 children randomized to receiving IOL implantation using one of the two techniques will be followed up until 12 months postoperatively.

The doctors participating in this study are looking to show improved vision with the HOYA AF-1 aspheric intraocular lens after cataract surgery. They will also study the use of Revital Vision (neuro-sensory testing) in providing the highest potential for improved vision.

The purpose of this study was to find out if in patients with non-exudative age-related macular degeneration (AMD), randomly assigned to cataract surgery, any AMD size progression or progression to exudative AMD could be detected 6 months after surgery.

The overall objective is to determine the visual outcomes and cost to perform Manual Small Incision Cataract Surgery (MSICS) in a small cohort at an academic medical center in the United States. The primary outcome measure will be the percentage of the study group achieving a post operative visual acuity 20/40 Snellen. This percentage will be compared to historical cohorts reported for phacoemulsification cataract surgery (PCS), when performed in academic centers. A secondary outcome will be to determine the actual institutional cost of providing MSICS in the setting of an academic medical center. The hypothesis is that MSICS is appropriate for a teaching environment (as evidenced by a comparable rate of 20/40 acuity or better at 90 days post op, as compared to PCS), and can be provided at a cost that makes visual rehabilitation affordable to the uninsured and underinsured.