CompletedNot Applicable

FS-LASIK Versus TransPRK for Mixed Astigmatism

Egypt39 participantsStarted 2019-06-15

Plain-language summary

Mixed astigmatism is a type of refractive error in which the two principal steep and flat meridians focus the light in front and behind the retina, respectively.1 Laser vision correction (LVC) for mixed astigmatism is challenging as it involves a bitoric ablative pattern to flatten the steepest meridian and steepen the flattest one. The aim of the current study was to compare the visual and refractive outcomes of FS-LASIK versus single-step TransPRK for treatment of patients with mixed astigmatism.

Who can participate

Age range18 Years – 50 Years

SexALL

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Inclusion Criteria: * Mixed astigmatism (Plus sphere up to +4 diopters D and a minus cylinder up to -6 D). * Stable refraction. * Clear cornea. * Normal corneal tomography. Exclusion Criteria: * Corrected distance visual acuity worse than 20/32 Snellen's acuity. * Difference between manifest and cycloplegic refraction ≥ 1 D. * Previous corneal or ocular surgeries, other ocular diseases. * Systemic diseases including diabetes mellitus and autoimmune diseases.

What they're measuring

Uncorrected distance visual acuity (UDVA)

Timeframe: 24 months

Corrected distance visual acuity (CDVA)

Timeframe: 24 months

Postoperative refraction

Timeframe: 24 months

Trial details

NCT IDNCT07481227

SponsorAssiut University

Sponsor typeOTHER

Study typeOBSERVATIONAL

Primary completion2025-06-15

View on ClinicalTrials.gov More Mixed Astigmatism trials