Corneal High Order Aberrations After Stream Light and Mechanical Photorefractive Keratectomy

Launched by ASSIUT UNIVERSITY · Oct 26, 2023

Keywords

ClinConnect Summary

This clinical trial is looking at two different types of eye surgery—Stream Light Trans-PRK and Mechanical Photorefractive Keratectomy—to see how they affect vision clarity by measuring changes in high order aberrations in the cornea. High order aberrations are visual imperfections that can affect how clearly you see, especially at night. The study aims to compare these changes before and after each type of surgery.

To participate in the trial, individuals should be between 20 to 40 years old and have stable vision for at least a year, meaning their eyesight hasn’t changed significantly. They should not have had any previous eye surgeries and must meet specific criteria regarding their cornea's shape and thickness. If enrolled, participants can expect to undergo the surgeries and have their vision monitored over time to help researchers understand the best techniques for improving eyesight. This trial is actively recruiting participants, and everyone is welcome to apply regardless of gender.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • • Stable refraction for 1 year (refraction does not exceed 1D more than the last prescribed glasses).
• • Discontinuation of soft contact lens wears at least 1 week before examination.
• * Topography criteria:
• • Corneal thickness equal or more than 470 um
• • Symmetrical bow-tie
• • Back elevation not more than +12
• • Normal Belin\\Ambrosio Enhanced ectasia display
• • Spherical equivalent not more than -6D.
• Exclusion Criteria:
• • • Previous ocular surgery
• • Concurrent ocular pathology; corneal scar, corneal dystrophy
• • Systemic disease; Uncontrolled diabetes, collagen disease
• • Post-operative complications; sub-epithelial haze.