CompletedNot Applicable

Q Value Customized Versus Wavefront Optimized Ablation in Femtosecond Laser-Assisted LASIK

Egypt40 participantsStarted 2020-06-01

Plain-language summary

Corneal asphericity is expressed numerically as the "Q-value". A minus value means that corneal curvature flattens towards the periphery and the cornea is prolate in shape, but when the curvature steepens towards the periphery, the cornea is oblate in shape and has a positive Q-value. The current study evaluates the effect of LASIK eye surgery on corneal asphericity by comparing 2 software treatment platforms; the Q value customized ablation versus the conventional Wave-front optimized ablation in a fellow eye study pattern.

Who can participate

Age range18 Years

SexALL

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Inclusion criteria

✓. Myopic Spherical Equivalent up to -12 diopters.
✓. Myopic astigmatism up to -6 diopters.
✓. Corneal thinnest location ≥ 500 um 4- Residual stromal bed ≥ 300 um.

Exclusion criteria

✕. Patients not candidates for LVC.
✕. Hyperopic patients or mixed astigmatism.
✕. Systemic disease that contraindicates LVC.
✕. Intra- or post-operative complications. 5- Previous corneal surgery

What they're measuring

Postoperative Q value

Timeframe: 6 months

Trial details

NCT IDNCT04738903

SponsorAssiut University

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2021-06-30

View on ClinicalTrials.gov More Patients With Myopic Spherical Equivalent up to -12 Diopters trials