asthenopia
Conditions
Interventions
The patient uses single focus CL and low grade progressive CL. Trial period is two weeks for each CL. The patients use CL with randomly assigned order.
Sponsors
Ohno-Matsui Kyoko
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1.Age: 20 to 40 2.Sex: Man and woman 3.Patients who can wear soft CL more than five days a week, and more than eight hours a day 4.Patients who are usually using single focus software CL 5.Patients who is awareness of asthenopia 6.Patients shall have at least 1.0 of distance vision for each eye with best correction 7.Patients who gives written informed consent voluntarily, before enrolling the study
Exclusion criteria
Exclusion criteria: 1.Patients who have anterior eye diseases and are not able to wear soft CL (e.g.: Dry eye) 2.Patient who use other types CL (e.g.: Hard CL, Ortho-Keratology CL) 3.Patients who received cornea refractive surgery 4.Patients who received cataract surgery 5.Patients who are suffer from systemic diseases 6.Patients who are pregnant or breastfeeding 7.Patients who take medicines or supplement that would influence accommodation amplitude 8.Patients who are judged as unsuitable for this study by investigator.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The degree of asthenopia symptom | — |
Secondary
| Measure | Time frame |
|---|---|
| Clinical evaluation (e.g. amplitude of accommodation, accommodative microfluctuations, eye position) | — |
Contacts
Public ContactYuko Iwasaki
Tokyo Medical and Dental University, Medical Hospital
Outcome results
None listed