Keratoconus.
Conditions
Interventions
Intervention 1: For Keraring 355 degree group:
All operations will be performed by the same surgeon at the department of ophthalmology, Bina Eye Hospital, Tehran, Iran. All surgical procedures will be
Treatment - Surgery
For Keraring 355 degree group:
All operations will be performed by the same surgeon at the department of ophthalmology, Bina Eye Hospital, Tehran, Iran. All surgical procedures will be performed in
For Myoring Group:
All operations will be performed by the same surgeon at the department of ophthalmology, Bina Eye Hospital, Tehran, Iran. All surgical procedures will be performed in operation ro
Sponsors
Bina eye hospital
Eligibility
Sex/Gender
All
Age
20 Years to 40 Years
Inclusion criteria
Inclusion criteria: Inclusion Criteria: 1.keratoconus patients ,2.age between 20 to 40,3.Both genders,4.corneal thickness>= 360 microns, 5.mean keratometry between 45 to 52 D,6.clear central cornea, 7.Patients should be discontinued their contact lenses for 3 weeks prior to the exams, 8.contact lenses in tolerance,9.visual acuity 21 mmHg, 13.Patients with autoimmune, connective tissue disorders, diabetes and immunosuppressive drugs users,14.Hyperopia, 15.uncooperative patients
Exclusion criteria
Exclusion criteria:
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Uncorrected Visual Acutiy (UCVA). Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: With using Snellen chart by the same optometrist. | — |
Secondary
| Measure | Time frame |
|---|---|
| Best Corrected Visual Acuity (BCVA). Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: With using Snellen chart by the same optometrist.;Corneal Thickness (Central and thinest point). Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: Using OrbscanII (Baush&Lomb) based on Micrometer.;Corneal irregularity. Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: OrbscanII (Baush&Lomb) based on Diopter.;Anterior and Posterior Elevation of Cornea. Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: OrbscanII (Baush&Lomb) based on Micrometer.;Corneal Aberrometry. Timepoint: preoperatively, 6 months postoperaively. Method of measurement: Using (Schwind Amaris, Germany).;Intraocular Lens Power. Timepoint: Preoperative, 6 months postoperatively. Method of measurement: Using A Scan.;Contrast Sensitivity. Timepoint: Preoperative, 6 months postoperatively. Method of measurement: Using ( Pelli-Robson test) chart and based on cpd.;K max and K mean. Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: OrbscanII (Baush&Lomb) based on Diopter.;Spherical Equivalent. Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: According to refrection results and based on Diopter.;Anterior Chamber Depth. Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: OrbscanII (Baush&Lomb) based on Milimeter.;Clinical Symptoms (Halo vision, Glare, Night vision, Night driving, Fluctuation, Activity Limitation and Foreign Body Sense). Timepoint: preoperative, 1, 3 and 6 months postoperatively. Method of measurement: According to patient interview and based on Likert scale.;Postoperative complications including Extrusion and Infection. Timepoint: Postoperation. Method of measurement: According to clinical examination.;Patient satisfactory rate. Timepoint: 1, 3 and 6 months postoperatively. Method | — |
Countries
Iran (Islamic Republic of)
Contacts
Public ContactLeila Janani
Tehran University of Medical Sciences, Clinical Trial Center (CTC)
Outcome results
None listed