Visual Quality
Conditions
Keywords
Objective visual quality, Orthokeratology
Brief summary
The visual quality indexes of these patients before and after Orthokeratology treatment were compared: 4 mm higher strehl ratio (SR) , 4 mm higher order corneal aberrations (Hoa ) , Spherical Aberrations (SA) , Comas, Trefoil Aberrations (RMS) , corneal aspheric index (Q, e) , corneal surface regularity index (SRI) , corneal surface asymmetry index (Sai)
Detailed description
USING OPD-SCAN III instrument method: Drag The joystick to focus on the screen prompt, and the device automatically starts to measure the aberration when the yellow focus is shown; Simk will change from black to rose red when the aberration is measured to start measuring the corneal topography, prompting the patient to blink the tear film evenly and press the button on the joystick when the focus is completed.The following data were obtained and analyzed: 4 mm high order STREHL rate (SR) , 4 mm high order corneal aberration (Hoa ) , Spherical Aberration (SA) , Coma Aberration (Coma) , Trefoil Aberration (RMS) , corneal aspheric index (Q, e) , corneal surface regularity index (SRI) , corneal surface asymmetry index (Sai)
Interventions
None listed
Sponsors
XiaoYong Liu
Study design
Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
8 Years to 25 Years
Healthy volunteers
No
Inclusion criteria
* The subject understands the purpose of this clinical trial and is willing, able and committed to return to the center for all clinical trial visits and to complete all research related procedures
Exclusion criteria
* 1\. Associated with corneal abnormalities, such as active Keratitis (corneal infection) , corneal dystrophy, Keratoconus, corneal Leukoplakia, corneal hypoesthesia, or previous corneal surgery, or a history of corneal trauma; * 2, there are other eye diseases, such as Dacryocystitis, dry eye disease, conjunctivitis, blepharitis, Uveitis, and other inflammation, Glaucoma, cataracts, fundus disease, eye tumors, ocular trauma, squint patients; * 3\. A history of allergy to contact lens or contact Lens Solution. * 4\. Test results indicate that subjects with contraindications or unsuitable for wearing Orthokeratology.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 4 mm high-order strehl ratio | 6 months | Objective visual quality 1 |
| 4 mm high-order corneal aberrations (Hoa) in Microns | 6 months | Objective visual quality 2 |
| Spherical Aberrations (SA) in Microns | 6 months | Objective visual quality 3 |
| Coma Aberrations (COMA) in Microns | 6 months | Objective visual quality 4 |
| Trefoil Aberrations in Microns | 6 months | Objective visual quality 5 |
| corneal aspheric index(Q) | 6 months | Objective visual quality 6 |
| corneal aspheric index(e) | 6 months | Objective visual quality 7 |
| corneal surface regularity index (SRI) | 6 months | Objective visual quality 8 |
| corneal surface asymmetry index (Sai) | 6 months | Objective visual quality 9 |
Countries
China
Contacts
Primary Contactxiaoyong Liu
Outcome results
None listed