Wavefront-guided PRK vs Wavefront-optimized PRK

Trial ID or NCT#



not recruiting iconNOT RECRUITING


The purpose of the study is to compare the results of PRKK surgery when using wavefront-guided excimer laser treatment compared to wavefront optimized excimer laser treatment in patients with nearsightedness with and without astigmatism

Official Title

A Prospective, Randomized Comparison of Fellow Eyes Undergoing Wavefront-guided PRK Versus Wavefront-optimized PRK Using the Alcon Allegretto Eye-Q 400 Excimer Laser

Eligibility Criteria

Ages Eligible for Study: 21 Years to 60 Years
Sexes Eligible for Study: ALL
Accepts Healthy Volunteers: Yes
Inclusion Criteria:
  1. * Subjects age 21 and older with healthy eyes.* Nearsightedness between -0.25 diopters and -8.00 diopters with or without astigmatism of up to 5.00 diopters.
Exclusion Criteria:
  1. * Subjects under the age of 21.* Excessively thin corneas.* Topographic evidence of keratoconus.* Ectactic eye disorders.* Autoimmune diseases.* Pregnant or nursing.* Patients must have similar levels of nearsightedness in each eye. They can not be more than 2.5 diopter of difference between eyes.* Patients must have similar levels of astigmatism in each eye. They can not have more than 1.5 diopter of difference between eyes.


Edward Manche, MD
Edward Manche, MD
Professor of Ophthalmology

Contact us to find out if this trial is right for you.


Linda Schwartz
650 498-7020