Healthy volunteer Healthy volunteer
Conditions
Interventions
For two types of optotypes (dark optotypes on a light background, bright optotypes on a dark background), look at up to 50 optotypes with different contrasts on a background of about 10 types of brigh
D015350
Sponsors
AKiba Ryutaro
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Patients who meet all of the following conditions are eligible. 1) Subjects aged 20 to 65 at the time of obtaining consent. 2) Subjects with corrected decimal visual acuity of 1.0 or more. 3) Subjects with no abnormalities in slit-lamp examination and fundus examination, and no other ocular abnormalities that cause photophobia. 4) Subjects who have given written informed consent of the patient's own free will with sufficient understanding after receiving a sufficient explanation for participation in this study.
Exclusion criteria
Exclusion criteria: 1) Those diagnosed with Irlen's syndrome. 2) Subjects who are judged inappropriate for participation in this study by the principal investigator or subinvestigator.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Concordance rate between the magnitude of the theoretically calculated value and the magnitude of contrast sensitivity measured by wearing a prototype lens based on the calculation | — |
Secondary
| Measure | Time frame |
|---|---|
| 1) Statistically significant difference in contrast sensitivity measured by wearing a lens with a large theoretical calculation value and a lens with a small theoretical calculation value 2) Visibility threshold curve (minimum and maximum brightness and their contrast values, minimum contrast values and their brightness, fitting function) 3) Chromaticity and luminance of inspection results | — |
Contacts
Public ContactGen Miura
Chiba University Hospital
Outcome results
None listed