Anxiety-related Fixation Instability During LASIK

Refractive Errors Clinical Trial

Official title: Anxiety-related Fixation Instability During Laser in Situ Keratomileusis (LASIK)

Status Completed

Clinical Trial Summary

Anxiety is common among patients undergoing eye surgery, which is typically performed under topical anesthesia while the patient is awake. This can be an unsettling experience for patients, who may worry about being able to keep their eyes still during surgery, cooperate with the surgical team, and remain immobile in an unfamiliar environment. Patients may also experience anxiety due to concerns about surgical pain, possible complications, and the uncertainty of the outcome of the surgery.

In this study, the investigators aimed to investigate the correlation between the severity of anxiety symptoms during LASIK, and fixation instability during photo-ablation as plotted by the eye tracker.

Clinical Trial Description

Patient cooperation during LASIK is essential for the surgeon's comfort and predictable results. Fixation instability, which is the inability of the patient to keep their eye still during surgery, is a common problem during LASIK surgery and may lead to unexpected outcomes.

Eye movements occur continually during the excimer ablation. These eye movements can have a large amplitude, a frequency of over 100 Hz, and a corneal speed of around 150 mm/s. With the advancement of scanning-spot excimer lasers, much work has focused on increasing the efficacy of the photo-ablation and smoothness of the ablated surface, especially with respect to the position of the patient's eye by developing state-of-the-art eye trackers to help maintain alignment during photoablation, which can improve refractive outcome. ;

Related Conditions & MeSH terms

• Refractive Errors

• NCT number: NCT06148428
• Study type: Observational
• Source: Assiut University
• Status: Completed
• Start date: August 15, 2018
• Completion date: July 15, 2023