Active clinical trials for "Cataract"

The purpose of our current series of studies is to evaluate different glaucoma treatments in vivo effect on the conventional outflow pathway, and specifically on the Schlemm's canal (SC) anatomy using Enhanced Depth Imaging (EDI)-optical coherence tomography (OCT) . The images will be taken as part of the patients routine medical follow up (before starting the treatment, and 1,4 and 12 weeks afterwards) diameter, cross-sectional area and volume will be measured using commercially available 3-dimensional reconstruction. The series of studies will be divided into 3 branches, each branch contains different treatments.For each treatment different patients will be recruited. The branches are as following- The surgical branch- Before and after trabeculotomy Before and after cataract surgery Before and after vitrectomy surgery Before and after XEN™ Gel Stent implant The pharmacological branch- Before and during the treatment with prostaglandins analogs Before and during the treatment with alpha blockers Before and during the treatment with beta blockers Before and during the treatment with carbonic anhydrase inhibitor The laser branch- Before and after trabeculoplasty Before and after laser iridotomy Before and after yag capsulotomy laser

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.

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.

One aspect to eye drop adherence is successful instillation of the drops; however, it is well known that many patients struggle with this task. Difficulties may include aiming their drops,extending their neck, preventing excess drop leakage, avoiding contamination of the bottle tip and generating enough force to expel a drop from the bottle. Instillation aids are devices that aim to ameliorate one or more of these barriers. Several eye drop dispensers had been developed in order to improved outcomes of eye drop instillation, including improved rates of successful administration and increased patient satisfaction compared to standard eye drop bottles. In this study we aim to compare the eye drops various installation aids

Clinical performance of phacoemulsification platform Stellaris Elite with standard irrigation fluid bottles in myopic eyes. Anterior chamber depth and patients comfort will be compared between the two groups.

Develop a measurement protocol by OCT imaging and characterization of the anterior chamber change in glaucoma patients before and after surgery. Show the effect of combined surgery in control of intra ocular pressure.

The purpose of this study is to investigate the changes in the pilocarpine-induced ciliary body movement before and after cataract extraction in order to determine the effect of lens sclerosis on the ciliary muscle contractility.

The purpose of this study is to evaluate the safety and effectiveness of three concentrations of rEV131, a new investigational anti-inflammatory agent, compared to placebo (an inactive substance) and an FDA approved anti-inflammatory agent in patients with ocular inflammation who have undergone cataract extraction with intra-ocular lens implantation.

The current standard for cataract surgery is phacoemulsification with intraocular lens (IOL) implantation. In this procedure, topical anesthesia has become favoured over local anesthetic blocks due to potential serious complications resulting from retrobulbar or peribulbar anesthesia. Routinely, intravenous sedation is used to supplement the topical anesthesia. If patients are not fasted, there is the potential to reduce preoperative discomfort and anxiety, ultimately improving the satisfaction with the care received. An additional benefit is that liberal fasting policies allow for flexibility in the scheduling of cases, particularly for urgent or semi-urgent situations. Clinical practice guidelines for cataract surgery published by the Canadian Ophthalmological Society (COS) recommend that fasting is unnecessary if only topical anesthesia is used without intravenous (IV) opiates or sedation. In general, these suggestions are in agreement with guidelines from the United Kingdom's Royal College of Ophthalmologists, who note that "it is unnecessary to fast patients for local anesthetic cataract surgery." According to the CAS practice guidelines, the same fasting restrictions are applied when IV sedation or anesthesia with peripheral nerve blocks (e.g. retrobulbar or peribulbar blocks) are administered. At our centre at the Kensington Eye Institute (KEI) in Toronto, Canada, almost all cataract patients receive fentanyl and midazolam, with propofol given only in rare circumstances with close observation. This research project at the Kensington Eye Institute will consist of two phases, namely a prospective, consecutive observational analysis and a prospective time-interrupted study. In the first phase, an observational analysis will be conducted in which consecutive cataract surgery patients will be surveyed with a validated questionnaire to assess their satisfaction. Inclusion criteria will include any cataract patient scheduled for surgery who is willing and able to participate in the study, with fully informed consent provided. Previously published literature has evaluated the use of a patient satisfaction questionnaire regarding preoperative fasting, which includes items on hunger, thirst, hoarseness of voice, difficulty breathing, pain, agitation, anxiety, nausea, vomiting, shivering and problems with concentration. A Research Assistant will complete the questionnaire with all patients preoperatively at KEI, as well as a baseline demographic checklist that will include the patient's age, gender, laterality, surgeon, length of time fasted for solids and clear liquids, as well as the type and amount of solids and liquids. Secondary endpoints will be collected postoperatively and will include the incidence of aspiration, nausea and vomiting, as well as the rate of cancellations of surgeries directly related to issues with fasting guidelines. The first phase of the study will be used to conduct an appropriate sample size calculation, which will ensure that our second phase is not underpowered for the primary efficacy endpoint. In the second phase, a time-interrupted prospective study will be established with the following two arms: (1) experimental arm: patients will be encouraged by the Research Assistant to drink clear fluids right up to the 2 hour limit as specified in the latest ASA and CAS guidelines, with no intervention applied for solids, and (2): control arm: standard of care without any encouragement to drink clear fluids up to the 2 hour limit. Patients will be assigned to groups based on month, so that the first month of study execution will enroll all patients into the experimental arm, the second month will enroll only into the control arm, and that subsequent months will alternate enrollment in a similar method. Given the design, the study will be in accordance with the latest ASA and CAS preoperative fasting guidelines, and will not involve any use of financial or other methods of coercion to incentivize patients that are randomly assigned to the experimental arm. The encouragement process will only involve the Research Assistant asking and encouraging the patient to drink a standardized quantity of clear fluid (up to 400mL of water, coffee, tea, apple or cranberry juice and maximum of 2 teaspoons of sugar) up to the ASA and CAS mandated guideline of 2 hours preoperatively, with the patient making the final determination of whether to comply. Following the encouragement process, a demographics and satisfaction questionnaire will be administered to each patient preoperatively, as well as another satisfaction questionnaire administered following the surgery. Baseline demographics, primary and secondary endpoints will remain consistent with the first phase.

Purpose of this study is to find a correlation between agitation (stress) indicating parameters and the pain perception during second eye cataract surgery, compared to first eye cataract surgery.