SMILE Surgery in One Eye Compared to Ray Tracing-guided LASIK Surgery in the Fellow Eye

Starting soon · Phase 4

Conditions studied: Myopia, Astigmatism

In brief

Participants will undergo LASIK surgery in one eye using ray tracing guided technology in one eye and LASIK surgery in the other eye using wavefront guided technology. We are comparing outcomes between the two technologies as measured by self reported quality of vision and quality of life outcomes using validated questionnaires before and after surgery. We will also be comparing outcomes between the two technologies including measurement of low contrast visual acuity,and best spectacle corrected visual acuity.

Key facts

Study ID

NCT07721714

Run by

Stanford University

People needed

62

Starts

2026-08-05

Expected to finish

2029-07-31

Last updated by the study team

2026-07-23

Who can join

Age: 22 and older, up to 59. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Subjects age 22 and older with healthy eyes. Nearsightedness between -1.00 diopters and -8.00 diopters.
• Subjects with less than or equal to 3.00 diopters of astigmatism.

You may not qualify if…

• Subjects under the age of 22. Subjects with excessively thin corneas. Subjects with topographic evidence of keratoconus. Subjects with ectactic eye disorders. Subjects with autoimmune diseases. Subjects who are pregnant or nursing. Subjects must have similar levels of nearsightedness in each eye. They can not be more than 1.5 diopter of difference between eyes.
• Subjects with more than 3.00 diopters of astigmatism Subjects must have similar levels of astigmatism in each eye. They can not have more than 0.75 diopters of difference between eyes.

Where it is running

• Byers Eye Institute — Palo Alto, California, United States

Full record on ClinicalTrials.gov

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