The Effect of Wearing Orthokeratology on Objective Visual Quality

XiaoYong Liu

Status: Unknown

Conditions: Visual Quality

Study type: Observational

Funder types: Other

Identifiers

NCT04929119

2021jnU

Details and patient eligibility

About

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)

Full 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)

Enrollment: 30 estimated patients

Sex: All

Ages: 8 to 25 years old

Volunteers: No Healthy Volunteers

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.

Trial design

30 participants in 5 patient groups

Before wearing the Orthokeratology

Description:

OPD-Scan was performed and the following data were recorded: 4 mm high order strehl ratio (SR) , 4 mm high order corneal aberrations (Hoa ) , Spherical Aberrations (SA) , Coma Aberrations (Coma) , Trefoil Aberrations (RMS) , corneal aspheric index (Q, e) , corneal surface regularity index (SRI) , corneal surface asymmetry index (Sai)

Wear Orthokeratology for a week

Description:

OPD-Scan was performed and the following data were recorded: 4 mm high order strehl ratio (SR) , 4 mm high order corneal aberrations (Hoa ) , Spherical Aberrations (SA) , Coma Aberrations (Coma) , Trefoil Aberrations (RMS) , corneal aspheric index (Q, e) , corneal surface regularity index (SRI) , corneal surface asymmetry index (Sai)

Wear Orthokeratology for a month

Description:

OPD-Scan was performed and the following data were recorded: 4 mm high order strehl ratio (SR) , 4 mm high order corneal aberrations (Hoa ) , Spherical Aberrations (SA) , Coma Aberrations (Coma) , Trefoil Aberrations (RMS) , corneal aspheric index (Q, e) , corneal surface regularity index (SRI) , corneal surface asymmetry index (Sai)

Wear Orthokeratology for three months

Description:

OPD-Scan was performed and the following data were recorded: 4 mm high order strehl ratio (SR) , 4 mm high order corneal aberrations (Hoa ) , Spherical Aberrations (SA) , Coma Aberrations (Coma) , Trefoil Aberrations (RMS) , corneal aspheric index (Q, e) , corneal surface regularity index (SRI) , corneal surface asymmetry index (Sai)

Wear Orthokeratology for six months

Description:

OPD-Scan was performed and the following data were recorded: 4 mm high order strehl ratio (SR) , 4 mm high order corneal aberrations (Hoa ) , Spherical Aberrations (SA) , Coma Aberrations (Coma) , Trefoil Aberrations (RMS) , corneal aspheric index (Q, e) , corneal surface regularity index (SRI) , corneal surface asymmetry index (Sai)