Red-green color blindness

This early-stage study at Johns Hopkins is testing whether cannabidiol (CBD) can reduce stress and nicotine withdrawal symptoms in people who smoke. Ninety healthy smokers will receive CBD and then be exposed to stress while researchers measure their mood, heart rate, and stress …

This program provides comprehensive low vision rehabilitation services to children aged 3 to 21 with vision impairment. Participants are prescribed optical devices and trained to use them, with the goal of improving their visual functioning and ability to read. The program aims t…

This pilot study tests whether a non-invasive headset that delivers mild electrical stimulation to nerves behind the ear can safely improve sleep in adults who are blind or severely sight impaired. Sixty participants will use the device for 30 minutes a day, five times a week for…

This study investigates whether people who use cannabidiol (CBD) regularly react differently to acute stress compared to those who do not. Healthy adults aged 21–70 who either use CBD daily or not at all will undergo a series of stressful tasks — including public speaking, mental…

This study tests a smartphone-based tool called VisionWay that helps people with visual impairments choose the most accessible walking path before they start walking. Researchers will ask participants to walk different routes on a university campus and rate sidewalk features like…

This study looks at how older adults with and without vision problems step over obstacles of different heights and colors. Researchers want to understand how vision and eye movements affect walking to help prevent falls. About 200 adults who can walk on their own will take part.