Comparison of Intralase and Visumax Femtosecond Laser for Laser In Situ Keratomileusis

Inclusion criteria

• 21 years of age or older.
• Cycloplegic spherical equivalent of >-1.00D
• Refractive cylinder -4.00 D or less.
• Best spectacle corrected visual acuity (BSCVA) of 6/12 or better in BOTH eyes.
• Spherical or cylindrical error has progressed at -0.50D or less per year from date of baseline measurement.
• Contact lens wearers must have removed contact lenses at least two (2) weeks before the baseline measurement.
• No evidence of irregular astigmatism on corneal topography.
• Available to attend post-operative examinations for a 3 month period.

Exclusion criteria

• Progressive or unstable myopia and/or astigmatism.
• Clinical or corneal topographic evidence of keratoconus.
• Residual, recurrent or active ocular disease such as uveitis, severe dry eyes, severe allergic eye disease, glaucoma, visually significant cataract and retinal disease.
• Previous corneal surgery or trauma within the corneal flap zone.
• Patent corneal vascularization within 1mm of the corneal flap zone.
• Taking systemic medications likely to affect wound healing, such as corticosteroids and antimetabolites.
• Systemically immunocompromised.
• Systemic disease likely to affect wound healing, such as diabetes, connective tissue disease and severe atopy.
• Pregnant or nursing.