Near and Intermediate Vision and Binocular Defocus Curves Before and After the LaserACE® Procedure

Inclusion Criteria:

• Are willing and able to understand and sign an informed consent
• Are willing and able to attend postoperative examinations per protocol schedule
• Are more than 40 years of age, of either gender and any race
• Have ≤1 D of preoperative refractive astigmatism in both eyes, measured in their manifest refraction
• Have a mean spherical equivalent refraction of +/- 0.50D for distance vision. Patients who meet this criterion as a result of prior laser refractive surgery (LASIK or PRK) are eligible for inclusion
• Have demonstrated stereoacuity of 100 seconds of arc or better, using a standard stereoscopic test
• Are in good ocular health, with the exception of presbyopia;
• have a demonstrated loss of accommodative range as evidenced by reduced near vision when corrected for distance

Exclusion Criteria:

• Amblyopia
• Previous radial keratotomy, or other corneal surgery besides LASIK or PRK (e.g. corneal transplant, DSAEK, lamellar keratoplasty)
• Previous anterior or posterior chamber surgery (e.g., vitrectomy, laser iridotomy)
• Diabetic retinopathy
• Macular degeneration
• Subjects with pupil abnormalities (e.g., corectopia)
• History of retinal detachment
• Subjects that have an acute or chronic disease or illness that would increase the operative risk or confound the results of this investigation (e.g., immunocompromised, connective tissue disease, clinically significant atopic disease, diabetes, and any other such disease or illness)
• Keratoconus
• Near vision at 40cm equivalent to their distance vision when corrected for distance (i.e., no evident effect of reduced accommodative range).