Health Condition 1: null- Patients willing to undergo refractive surgery to correct myopia and astigmatsim
Conditions
Interventions
Intervention1: CONTURA laser-assisted in situ keratomileusis treatment: One eye will undergo laser-assisted in situ keratomileusis with CONTURA Topography guided system
Control Intervention1: Bowmans
Sponsors
Narayana Nethralaya
Alcon Laboratories Pvt Ltd
Eligibility
Inclusion criteria
Inclusion criteria: 1. Patients should be between 18 to 50 years of age. 2. Patient must have stable myopia for a minimum period of one year (a change of 0.25D or less) as documented by prior clinical records or current spectacle correction. Patient must have a corrected distance visual acuity of 0.8 Decimal or better, 3. Patient must have a spherical equivalent refraction less than -10D 4. Patient must have refractive astigmatism less than -3D.
Exclusion criteria
Exclusion criteria: 1. Patient must not have a central corneal thickness less than 480 micrometer 2.Patient must not have a calculated residual s stromal bed thickness of less than 250 micrometer after the surgery 3. Patient must not have symptoms or signs of keratoconus, diabetes, collagen vascular disease, pregnancy, breastfeeding and any prior ocular surgery. 4. Patient must not have an inter-ocular difference of more than 1.00 diopter of spherical or 0.50 D of cylindrical refractive error. 5. Patient must not be on chronic systemic steroids or other medication that can affect wound healing. 6. Patient must not be allergic to primary or alternative medications. 7. Patient must not be using rigid contact lenses for the last three weeks or soft contact lenses for at least 1 week before the preoperative evaluation.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Visual acuity corrected and uncorrected, wavefront aberrationsTimepoint: Pre-surgery, 1 week, 1 month, 3 month, 6 month | — |
Secondary
| Measure | Time frame |
|---|---|
| Corneal tomography and biomechanical responseTimepoint: Pre-surgery, 1 week, 1 month, 3 month, 6 month | — |
Countries
India
Contacts
Public ContactDr Rohit Shetty
Narayana Nethralaya
Outcome results
None listed