Health Condition 1: null- Patients opting for refractive surgery for correction of myopia and astigmatism
Conditions
Interventions
Intervention1: Wavefront guided laser assisted in situ keratomileusis: One group will undergo Wavefront guided laser assisted in situ keratomileusis using iDesign
platform (Johnson and Johnson, USA).
Sponsors
Narayana Nethralaya
Abbott Medical Optics
Eligibility
Inclusion criteria
Inclusion criteria: Patients should be between 18 to 50 years of age. 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 (CDVA) of 0.8 or better Patient must have a spherical equivalent refraction less than â??10D Patient must have refractive astigmatism less than 3D
Exclusion criteria
Exclusion criteria: Patient must not have a central corneal thickness less than 480 micrometer Patient must not have a calculated residual stromal bed thickness of less than 250 micrometer after the surgery Patient must not have symptoms or signs of keratoconus, diabetes, collagen vascular disease, pregnancy, breastfeeding and any prior ocular surgery. Patient must not have an interocular difference of more than 1.00 diopter of spherical or 0.50 D of cylindrical refractive error. Patient must not be on chronic systemic steroids or other medication that can affect wound healing. Patient must not be allergic to primary or alternative medications. 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 |
|---|---|
| Uncorrected and distance visual acuity, Wavefront aberrometryTimepoint: Pre-surgery, 1 month, 3 month, 6 month | — |
Secondary
| Measure | Time frame |
|---|---|
| Corneal tomography, Biomechanics of the cornea, ocular surface discomfort (OSDI score)Timepoint: Pre-surgery, 1 month, 3 month, 6 month | — |
Countries
India
Contacts
Public ContactRohit Shetty
Narayana Nethralaya
Outcome results
None listed