Patients scheduled for a surgery during general anesthesia.īaseline PD was measured the day before surgery. Single-center, postanesthesia care unit (PACU). Prospective, observational, cohort study. To investigate whether pupil diameter (PD) measured during scotopic conditions is influenced by pain in conscious patients in the early postoperative period. If the ablation zone is smaller than pupil diameter, When the pupil diameter is greater than the ablation zone in Excimer laser surgery, myopic blur may be expected, which reduces visual function following photorefractive surgery.
In refractive surgery, pupil diameter may directly influence visual performance and quality of life. Galileo was probably the first to document measurement of pupil diameter and 300 years later, the significance of this in refractive surgery has been realised. The mean photopic pupil diameter was 3.2 ± 0.7 mm (range 2.0–5.5 mm) with the Colvard pupillometer and 3.9 ± 0.8 mm (range 2.0–5.5 mm) with Discussion (range 3.0–6.5 mm) with the Nidek auto-refractor at the commencement of the study in low mesopic conditions. (range 3.0–7.0 mm) with the Colvard pupillometer and 4.8 ± 0.9 mm S.D. The mean pupil diameter was 4.8 ± 0.9 mm S.D. The age range was 24–40, with a mean of 33.3 ± S.D.
AVERAGE PUPIL SIZE FULL
All volunteers underwent a full ocular examination which included examination of the iris looking for Resultsįorty-six volunteers (46 eyes) were recruited for this study, 22 males and 24 females. They were also excluded if they were diabetic, had a history of autonomic neuropathy, were on systemic drugs or had a history of alcohol abuse. Volunteers were excluded if they were on topical medication, had a history of eye disease, eye surgery and eye trauma.
Healthy volunteers were recruited from the staff and relatives of patients attending a general ophthalmology clinic in Birmingham, UK.
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