Color vision disorder

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 looks at children with molar-incisor hypomineralisation (MIH), also called cheese molars, to see if the color of the defect can predict future enamel breakdown. Researchers will photograph and scan affected teeth over nine months and compare the scans to measure enamel…

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 investigates how the human eye focuses on objects of different colors. Healthy volunteers aged 18-35 with normal vision will view colored shapes on a screen that appear to jump in distance. A wavefront sensor measures how accurately and quickly the eye refocuses. The g…

This study aims to collect DNA samples and detailed eye exam data from 1,000 people with rare inherited eye diseases like aniridia, Best disease, and albinism. Participants provide a saliva or blood sample and share their eye health records. The goal is to expand a research repos…

This registry collects information from people with inherited retinal diseases, like retinitis pigmentosa and Stargardt disease. Participants share their symptoms, family history, and genetic test results online. The goal is to help researchers understand these rare diseases and …

This study looks at how color vision changes over time in people with inherited retinal diseases (IRDs). Researchers will study 200 participants, including those with IRDs and healthy volunteers, to see how color vision loss relates to changes in the retina's structure. They are …

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.