Myopia, Hyperopia, Astigmatism, Anisometropia
Conditions
Interventions
Gold Standard:Binocular Vision Screening Device - Snellen Eye Chart
Index test:PFC Vision Screening Device
Sponsors
Sichuan Provincial Maternity and Child Health Care Hospital
Eligibility
Sex/Gender
All
Age
1 Years to 4 Years
Inclusion criteria
Inclusion criteria: 1. Ages 12 to 47 months, any gender; 2. Children who cannot cooperate with the regular 'E' chart eye test due to age, cognitive ability, or level of cooperation;
Exclusion criteria
Exclusion criteria: 1.History of ocular surgery, or presence of ocular structural abnormalities and organic eye diseases; 2.Presence of mental or intellectual developmental disorders, or severe neurological diseases;
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Refractive status;Visual acuity;Result consistency (considered consistent if the difference with the Lea chart is =2 lines); | — |
Secondary
| Measure | Time frame |
|---|---|
| Measurability (the proportion of children who complete the test); testing duration (test efficiency); | — |
Countries
China
Contacts
Public ContactChen Xinhua
Sichuan Provincial Maternity and Child Health Care Hospital
Outcome results
None listed