presbyopia
Conditions
Interventions
single vision spectacles group:give near addition, single vision spectacle
progressive addition spectacles group:give progressive addition spectacles
control group:N/A
Sponsors
West China Hospital, Sichuan University
Eligibility
Sex/Gender
All
Age
55 Years to 70 Years
Inclusion criteria
Inclusion criteria: 1) Age 55 to 70 2) Both far and near corrected vision are normal (?LogMAR 0.1) Second Stage: 3) The adjustment and binocular vision function were normal for the corresponding age group.
Exclusion criteria
Exclusion criteria: 1) Age-related macular disease, moderate to severe cataract and other organic diseases of the eye 2) strabismus and amblyopia 3) anisometropia (equivalent globular degree =1.00D) or high myopia 4) Mental disease
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| monocular contrast threshold;binocular contrast threshold;binocular summation;binocular suppression;binocular eye imbalance;stereopsis acuity; | — |
Secondary
| Measure | Time frame |
|---|---|
| Monocular/Binocular visual acuity;reading speed;reading accuracy ;Scores of near visual functional correlation questionnaire; | — |
Countries
China
Contacts
Public ContactYutong Song
West China Hospital
Outcome results
None listed