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Find 385 clinical trials for ulcerative colitis near Chicago, Illinois. Connect with research centers in your area.
Showing 141-160 of 385 trials
NCT03804840
Marijuana use, for both recreational and therapeutic purposes, is becoming increasingly common as states remove restrictions on use. The increased use raises new concern about the safety of this drug, including its ability to impair basic cognitive and psychomotor tasks, and whether the users are aware of their impairment. We propose to design a simple performance test that users can use in the field, using a cell phone, to assess their level of impairment relative to their own drug-free state. In this preliminary study, we will compare participants' simple task performance after a known dose of delta-9-tetrahydrocannabinol (THC), or placebo, administered under double-blind conditions. In our app the participants will be asked to gauge their own perceived level of impairment (as determined by self-ratings and judgments of impairment) as well as their actual impairment (as gauged by the app), providing important feedback and training about their ability to detect impairment.
NCT06549010
Perimetry is an essential component in the diagnosis and monitoring of glaucoma. Since the advent of Standard Automated Perimetry (SAP), one of the clinical standards has been the Humphrey Field Analyzer (HFA, Carl Zeiss AG, Oberkochen, Germany). Visual field (VF) testing provided by the HFA is standard-of-care in glaucoma clinics and other ophthalmology and optometry practices. However, the HFA is a large device that does not allow for examination outside the clinic and can be uncomfortable for patients with limited mobility. This study aims to evaluate a novel head-mounted perimeter against the HFA as an alternative method of VF testing. This new perimeter uses a Virtual Reality (VR) headset and a gamified version of VF testing to assess the visual function of healthy eyes and patients. The results of this study will potentially serve as pilot data for the design of a larger study that involves the full assessment of the VR headset and its VF test, based on various testing strategies.