Eye Scan to Help Detect Parkinson's Disease Early
Tests whether a non-invasive eye scan can spot early Parkinson's disease.
Plain-language title generated from the registry record
Registry title: Non-Invasive Fundus Retinal Detection Technology for Early Diagnosis of Parkinson's Disease
Key facts
- Where
- Hangzhou, ChinaSee the site
AI summary: who the study is looking for
From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.
The trial is looking for adults aged 40-80 with early Parkinson's disease, other parkinsonian syndromes, essential tremor, or healthy people. It tests a non-invasive eye (retina) scan for early diagnosis.
- Age
- 40-80 years
- Sex
- All sexes can join.
- Disease stage
- Parkinson's disease group: Hoehn and Yahr stage 1 to 2.5, disease duration of ≤5 years. Parkinsonian syndromes group: disease duration of ≤5 years. Essential tremor group: disease duration of ≥1 year, no parkinsonian symptoms.
- Earlier treatment
- Healthy control group: no use of antipsychotic/dopaminergic medications in the past 3 months. Drug-induced parkinsonism: antipsychotic medications taken for ≥3 months.
Main reasons for not taking part
- Severe eye (fundus) diseases such as glaucoma, cataract, retinal detachment or macular degeneration
- Cannot tolerate the non-invasive retinal scan
- Severe heart or brain blood vessel disease, liver or kidney problems, or cancer
- Pregnancy or breastfeeding
- Active infectious disease, systemic inflammatory disease or psychiatric disorder
Read by machine on 12 November 2026.
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 40 and 80 years old?
Source: NCT07244640, who can take part
Where in China
- 2nd Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, ChinaContact: Feng Gao, MD, PhDTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorTrial details
- Who runs it
- Second Affiliated Hospital, Zhejiang University, School of Medicine
- Trial code
- NCT07244640
- Record updated
- 24 November 2025
- Original description
The objective of this observational study is to investigate whether non-invasive fundus retinal detection technology can be used for the early diagnosis of parkinson's disease (PD). It aims to answer the following primary questions: the sensitivity and specificity of non-invasive fundus retinal detection technology in the early diagnosis of PD; and whether this technology offers advantages over dopamine transporter positron emission tomography (DAT-PET), a conventional screening method for PD. The researchers will analyze the diagnostic performance of this technology for early-stage PD patients among cohorts including early parkinson's disease, parkinson's syndromes, essential tremor patients, and healthy individuals. Furthermore, in PD patients who concurrently undergo DAT-PET imaging, the study will compare the diagnostic value of non-invasive retinal imaging against that of DAT-PET.Read full original descriptionShow less
Clinical Study on Non-Invasive Fundus Retinal Detection Technology for Early Diagnosis of Parkinson's Disease
The objective of this observational study is to investigate whether non-invasive fundus retinal detection technology can be used for the early diagnosis of parkinson's disease (PD). It aims to answer the following primary questions: the sensitivity and specificity of non-invasive fundus retinal detection technology in the early diagnosis of PD; and whether this technology offers advantages over dopamine transporter positron emission tomography (DAT-PET), a conventional screening method for PD. The researchers will analyze the diagnostic performance of this technology for early-stage PD patients among cohorts including early parkinson's disease, parkinson's syndromes, essential tremor patients, and healthy individuals. Furthermore, in PD patients who concurrently undergo DAT-PET imaging, the study will compare the diagnostic value of non-invasive retinal imaging against that of DAT-PET.
Inclusion: 1. Aged 40-80 years; 2. Parkinson's Disease Group: Patients who meet the 2015 International Movement Disorder Society clinical diagnostic criteria for Parkinson's disease, with a Hoehn and Yahr stage of 1 to 2.5 and a disease duration of ≤5 years; 3. Parkinson's Syndromes Group: Patients who meet the International Movement Disorder Society diagnostic criteria for atypical parkinson's syndromes (including progressive supranuclear palsy, dementia with Lewy bodies, and corticobasal degeneration), multiple system atrophy (P subtype), or secondary parkinson's syndrome (drug-induced: having taken antipsychotic medications for ≥3 months; vascular: confirmed by brain MRI showing leukoaraiosis/lacunar infarction), with a disease duration of ≤5 years; 4. Essential Tremor Group: Patients who meet the 2018 International Movement Disorder Society clinical diagnostic criteria for essential tremor, with no parkinsonian symptoms, and a disease duration of ≥1 year; 5. Healthy Control Group: Individuals with no parkinsonian symptoms (confirmed by neurological examination) and no use of antipsychotic/dopaminergic medications in the past 3 months; 6. All subjects have provided written informed consent and are willing to comply with the study procedures.
Exclusion: 1. Presence of severe ocular fundus diseases, such as glaucoma, cataract, retinal detachment, macular degeneration, etc; 2. Inability to tolerate the non-invasive fundus retinal detection; 3. Known allergy or investigator-suspected high risk of allergy to anti-PD drugs; 4. Presence of severe cardiovascular or cerebrovascular diseases (e.g., coronary heart disease, myocardial infarction, stroke, etc.), hepatic or renal dysfunction, cancer, or other conditions that may affect the prognosis; 5. Pregnancy or lactation; 6. Presence of active infectious diseases (e.g., tuberculosis, AIDS) or systemic inflammatory diseases (e.g., rheumatoid arthritis); 7. Presence of psychiatric disorders.