View clinical trials related to Cataract.
Filter by:The purpose of this study is to evaluate the safety and efficacy of staged and combined phacoemulsification with intraocular lens implantation and Descemet membrane endothelial keratoplasty (DMEK) to treat cataract patients with corneal endothelial dysfunction. Surgical and postoperative complications, visual acuity and corneal endothelial cell density are evaluated.
The purpose of the present study was to evaluate the efficacy and safety of subtenon block (SB)anesthesia with dexmedetomidine in combination with bupivacaine versus intravenous dexmedetomidine for postoperative analgesia and emesis control in infants undergoing cataract surgery.
In this study, the investigators introduce a new "capsule-reserved" cataract surgical procedure in which anterior lens capsule is reserved and attached onto posterior lens capsule in the purpose of preventing posterior capsule opacification (PCO). A prospective randomized controlled study is reported to compare the new "capsule-reserved" surgical procedure with conventional one on the effectiveness to prevent posterior capsule opacification in age-related cataract patients.
This randomized controlled subject- and examiner-masked study comprised patients scheduled for cataract surgery.The patients will be randomly assigned to receive either balanced salt solution（BSS）or hydroxypropyl methylcellulose（HPMC）2% gel （Cornea Protect）.Each subject should undertake examination including - rupture time (TBUT), height of the river of tears, fluorescence staining, Schirmer Ⅰ test, ocular surface disease index (OSDI) and self-conscious symptom assessment questionnaire for assessment.
This study evaluates the various ocular parameters which are necessary for ocular biometry and the calculated IOL powers using both dual Schiempflug analyzer and optical low-coherence refelctometry.
This study evaluates the safety and effectiveness of a capsular tension ring (CTR) when used during cataract surgery. Capsular Tension Rings are used during intraocular lens implantation to give added support in order to keep the intraocular lens well centered, especially in eyes with weak or partially absent zonules. In many cases, capsular tension rings allow a lens to be successfully implanted into an eye which otherwise could not have supported an intraocular lens.
Objective: To compare intraocular pressure lowering effect of combined sclerotomy ab interno with phacoemulsification and phacoemulsification alone, in primary or secondary open angle glaucoma patients. Study design: Prospective, randomized, case- control interventional surgical trial
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.
During cataract surgery an artificial lens is implanted in the eye. These artificial lenses are called intraocular lenses (IOLs) and there are many different types of IOL designs. Your eyes have astigmatism, which is a normal and common characteristic of the eye. If left uncorrected the astigmatism would mean that you would need to wear spectacles for viewing distance objects. New IOL designs called toric IOLs help to correct the astigmatism to improve your vision after cataract surgery. This study has been designed to look at how well a toric IOL corrects this astigmatism so that you do not need to wear spectacles for viewing distance objects. There are many designs of these toric IOLs and for this study we are looking to compare two different designs of toric IOLs by putting one lens in your right eye and a different type of lens in your left eye. Both lenses are commercially available and are commonly implanted IOLs. Using new non-invasive methods we hope to be able to better judge the visual performance of these lenses and the ability of these lenses to correct astigmatism. In addition the study will involve imaging and examining the IOLs to determine the prevalence of any post-operative complications.
This is a randomized, masked, placebo controlled study to assess the effect on visual acuity, if any, of the PRN omega-3 nutritional supplement in subjects undergoing cataract surgery.