Healthy individuals / Presbyopia
Conditions
Interventions
None listed
Sponsors
Negishi Kazuno
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1) Age 20 years and above, up to 35 years; and 40 years and above, up to 55 years 2) Distance-corrected visual acuity of 1.0 or better in each eye, and distance-corrected near visual acuity of 0.5 or better with both eyes 3) Participants who can operate an iPhone and use applications without any issues. 4) Participants who are able to provide written consent after understanding the content of this study.
Exclusion criteria
Exclusion criteria: 1) Systemic or ocular diseases affecting visual function 2) History of internal ocular or refractive surgery 3) Dry eye (corneal epithelial scoring of 3 or higher or presence of subjective symptoms) 4) Difficulty in accurate communication 5) Participants who are judged to be inappropriate as a cooperator by a doctor in charge.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Amount of change in near visual acuity and near additional power associated with changes in brightness environment | — |
Secondary
| Measure | Time frame |
|---|---|
| -Amplitude of accommodation -Pupillary area -Questionnaire on subjective eye symptoms -Near functional visual acuity | — |
Contacts
Public ContactMiyuki Kubota
Shonan Keiiku Hospital
Outcome results
None listed