Is the Pupil Involved in Duane Syndrome? Static and Dynamic Pupillometry Characteristics.

Area of Science:

• Ophthalmology
• Neuro-ophthalmology
• Genetics

Background:

• Duane syndrome (DS) is a congenital eye movement disorder characterized by limited abduction and/or adduction, often associated with sixth nerve abnormalities.
• Ocular motility disturbances and eyelid abnormalities are hallmark features of DS.

Purpose of the Study:

• To investigate static and dynamic pupillary characteristics in patients diagnosed with Duane syndrome.
• To compare pupillary function between individuals with DS and healthy control subjects.

Main Methods:

• The study included 22 patients with unilateral isolated DS and 52 healthy controls.
• Pupillometry was performed using the MonPack One system to evaluate static and dynamic pupil responses.
• All participants underwent comprehensive ophthalmological examinations.

Main Results:

• No statistically significant differences were observed in static or dynamic pupillometry parameters between DS patients and healthy controls.
• While best-corrected visual acuity (BCVA) differed significantly, pupillary function remained comparable.
• The study included a mean age of 11.05 years for DS patients and 12.54 years for controls.

Conclusions:

• The pupil does not appear to be involved in the pathophysiology of Duane syndrome based on current findings.
• Further research with larger cohorts, diverse DS types, and varying age groups may provide additional insights.