Night Blindness clinical trials
The registry lists 58 studies for Night Blindness across more than 10 countries. 2 are recruiting or about to start. Per ClinicalTrials.gov, last updated 2026-01-14.
Status
- Completed
- 47
- Status unknown
- 7
- Recruiting
- 2
- Active, not recruiting
- 2
Phase
- Phase 3
- 8
- Phase 2
- 7
- Early Phase 1
- 2
- Phase 4
- 1
Where
- United States
- 11
- Bangladesh
- 7
- United Kingdom
- 3
- China
- 3
- Ethiopia
- 3
- Zambia
- 3
Who runs them
USDA, Western Human Nutrition Research Center (5) · Johns Hopkins Bloomberg School of Public Health (5) · University of California, Davis (3) · Purdue University (3) · Wageningen University (3) · Swiss Federal Institute of Technology (3) · London School of Hygiene and Tropical Medicine (2) · University of Wisconsin, Madison (2)
Studies
Recruiting first, then most recently updated. Showing 50 of 58 — search for more.
- Investigating Brain Function in People With and Without Visual Snow Syndrome Using Adaptation to Visual StimuliRecruitingNCT06961864Not applicable1 country
- Validation and Simplification of the Retinol Isotope Dilution Technique in Burkinabe SchoolchildrenRecruitingNCT067594931 country
- Knowledge of Students About Vitamin A and Assessment of Eye Manifestations in Quranic Schools (Khalwai) Khartoum State, Sudan 2022CompletedNCT069898791 country
- Visual Activity Evoked by Infrared in Humans After Dark AdaptationCompletedNCT02909985Not applicable1 country
- Egg Intervention During Pregnancy in IndonesiaActive, not recruitingNCT04694235Not applicable1 country
- Prevalence Of Vitamin A Deficiency In Critically Ill Children With Sepsis And Its Association With Clinical OutcomesCompletedNCT063914371 country
- Impact of Food-to-Food Fortified Cereal Products on Diet Quality in Rural Niger VillagesCompletedNCT058939011 country
- Senegal Market Study for Food-to-Food Fortified (F2F) Instant Porridge FloursCompletedNCT058720611 country
- Impact of Food-to-Food Fortified Cereal Products on Diet Quality in Eldoret, KenyaCompletedNCT058826821 country
- Effect Of Multiple Biofortified Food Crops On Micronutrient Status And Immune Function Among Indian Infants and Their MothersActive, not recruitingNCT02648893Not applicable1 country
- Iron and Vitamin A in School ChildrenCompletedNCT04137354Not applicable1 country
- Efficacy of Yellow Cassava to Improve Vitamin A Status of Kenyan School ChildrenCompletedNCT01614483Not applicable1 country
- Single-dose Postpartum Vitamin A Supplementation of Mothers and NeonatesCompletedNCT00198718Phase 2
- Community Trial of Newborn Vitamin A Supplementation to Reduce Infant Mortality in Rural BangladeshCompletedNCT00128557Phase 31 country
- Comparison of Different Refraction Measurements in AdultsCompletedNCT044345211 country
- Nutritional Status and Bouillon Use in Northern GhanaCompletedNCT046327711 country
- Efficacy and Safety of Vitamin A Treatment for Children With SepsisStatus unknownNCT04127968Not applicable
- Individualized Dietary Intervention in Breastfeeding Women: Body Weight and Vitamin A StoresCompletedNCT03640104Not applicable1 country
- Retinol Status in Preterm Infants and MothersCompletedNCT04780958Not applicable1 country
- Bioefficacy of Beta-cryptoxanthin From Biofortified MaizeStatus unknownNCT04153968Not applicable1 country
- Liver and Bone Retinol Levels in Guatemalan Adolescents and AdultsStatus unknownNCT044382002 countries
- The Efficacy of Pro-vitamin A Biofortified Cassava on Vitamin A Status in Nigerian Preschool ChildrenCompletedNCT02627222Not applicable1 country
- Estimating Average Vitamin A Requirements in Indonesian and American WomenCompletedNCT04123210Not applicable2 countries
- Effects of EED on Zn Absorption and Retention in Children From a Standard DoseCompletedNCT027600952 countries
- The Correlation Between Vitamin A / E Levels and PreeclampsiaStatus unknownNCT03971604Not applicable1 country
- Effects of Fat-soluble Vitamins Supplementation on Common Complications and Neural Development in Very Low Birth Weight InfantsStatus unknownNCT03876704Phase 31 country
- Evaluation of a Night Spectacle Correction Concerning an Improvement of Mesopic Vision QualityCompletedNCT02965534Not applicable1 country
- Nutritional Outcomes After Vitamin A Supplementation in Subjects With SCDCompletedNCT03632876Not applicable1 country
- Sub Regional Micronutrient Survey in EthiopiaStatus unknownNCT033536622 countries
- Using Stable Isotopes to Assess the Effectiveness of Vitamin A Supplementation in CameroonCompletedNCT03383744Not applicable
- Using Stable Isotope Techniques to Monitor and Assess the Vitamin A Status of Children Susceptible to InfectionCompletedNCT02363985Not applicable1 country
- Vitamin A Liver Reserves and Serum Markers of Vitamin A in US Adults at Time of DeathCompletedNCT033050421 country
- Assessing Model Parameters for Applying the Retinol Isotope Dilution (RID) MethodCompletedNCT02996513Not applicable1 country
- Efficacy of Biofortified Maize to Improve Maternal and Infant Vitamin A StatusCompletedNCT02804490Phase 31 country
- Impact of Consumption of Orange-fleshed Sweet Potatoes on the Vitamin A Status of Bangladeshi Women of Reproductive AgeCompletedNCT00453648Not applicable
- Adrenal Cortical Function and Vitamin A Deficiency in SepsisCompletedNCT03152474Phase 4
- Vitamin A to Reduce HIV in Vaginal Secretions and Prevent Viral TransmissionCompletedNCT00053612Phase 2
- Stopping Postpartum Vitamin A Supplementation: Missing Concealed BenefitCompletedNCT02043223Phase 2/31 country
- Vitamin A Equivalence of the Provitamin A in Biofortified BananasCompletedNCT02702622Not applicable
- Efficacy of Vitamin A in Fortified Extruded Rice in School ChildrenCompletedNCT01199445Early Phase 11 country
- An Efficacy Trial of Iron, Zinc and Vitamin A Fortified Rice in Children in Satun, ThailandCompletedNCT01061307Early Phase 12 countries
- Vitamin A, Stool Microbiota and Vaccine Response in Bangladeshi InfantsCompletedNCT020276102 countries
- Effect of SNPs in the BCMO1 EnzymeCompletedNCT02276014Not applicable1 country
- Effect of Daily Consumption of Orange Maize on Breast Milk Retinol in Lactating Zambian WomenCompletedNCT01922713Not applicable1 country
- Beta-carotene Absorption and Bioconversion to Vitamin A From Biofortified Cassava GariCompletedNCT02210507Not applicable1 country
- Efficacy of Newborn Vitamin A Supplementation in Improving Immune FunctionCompletedNCT01583972Not applicable1 country
- Efficacy of β-carotene Biofortified Maize in Reducing Vitamin A Deficiency Among ChildrenCompletedNCT01695148Phase 31 country
- Effect of Vitamin A Supplementation on Immune Responses in Human NeonatesStatus unknownNCT01476358Phase 21 country
- Vitamin A Bioavailability in Lactating Women With Marginal Vitamin A StatusCompletedNCT01420406Not applicable1 country
- Treatment of Congenital Stationary Night Blindness With an Alga Containing High Dose of Beta CaroteneCompletedNCT00569023Not applicable1 country