Based on the Hospital Anxiety and Depression scale anxiety sub-score (HADS anxiety sub-score, the seven-item anxiety sub-score for scaling a patient's anxiety levels before LASIK)

Patients who had a sub-score of ≤7 denotes no anxiety scale (normal).

Based on the Hospital Anxiety and Depression scale anxiety sub-score (HADS anxiety sub-score, the seven-item anxiety sub-score for scaling a patient's anxiety levels before LASIK)

Patients who had a sub-score of 8-10 denotes doubtful anxiety scale (borderline).

Based on the Hospital Anxiety and Depression scale anxiety sub-score (HADS anxiety sub-score, the seven-item anxiety sub-score for scaling a patient's anxiety levels before LASIK)

Patients who had a sub-score of 11-21 is abnormal and denotes a definite anxiety scale (case).

Patients were planned to undergo laser in situ keratomileusis. Local anesthesia was achieved by preservative-free oxybuprocaine hydrochloride 0.4% drops (a commonly used topical anesthetic due to its effectiveness in alleviating pain and ocular surface discomfort during the procedure). During surgery, the lights of the operating room were dimmed as much as possible and the surgeons spoke to the patients in a calm voice and explained what was happening. They also reassured the patients that the surgery was going as planned and would be over soon.

For patients undergoing (Microkeratome) MK-LASIK, a Moria 2 Microkeratome (Moria SA, Antony, France) was used to create the flap. For patients undergoing Femtosecond LASIK (FS-LASIK), the Allegretto Wave Light FS-200 femtosecond Laser (Alcon labs, Fort Worth, TX, USA) was used for flap creation.

Laser ablation was performed using WaveLight EX500 Excimer Laser (Alcon labs, Fort Worth, TX, USA) with a planned post-operative emmetropia.

This is a scheme that allows the system to capture the image, process it, and then verify eye position with the next image before releasing the pulse. After treatment, the system releases a summarized treatment report including a plot that depicts various pupil center positions within 3.0 mm off-center (on x and y axes) relative to the eye tracking cameras during ablation.

Upon entering the operating room, patients were attached to a pulse oximeter, and an operating room nurse recorded the heart rate (HR) at the start of the operation, during flap creation, during ablation, and at the end of surgery.