A dynamical method to objectively assess infantile nystagmus based on eye tracking. A pilot study

MARCOS MEO; JESSICA A. DEL PUNTA; IRENE SANCHEZ PAVON; RODRIGO DE LUIS GARCIA; GUSTAVO GASANEO; RAUL MARTIN HERRANZ

Journal of Optometry

Elsevier

Año: 2023

1888-4296

Purpose: The purpose of this research is to propose a new method for the easy, inexpensive and objective quantification of nystagmus using eye-tracking records collected during a simple reading task that could be implantable in clinical practice to assess patients with nystagmus.Methods: This is a prospective, observational pilot study. Eye movements of 4 nystagmus patients and 9 healthy children during a reading task (a paragraph with 82 words) on a 15´´ monitor were collected and compared. Data are time series indicating the gaze position on the screen. Two quantifiers were proposed: IndS (based on the speed of movements) and IndF (based on the variation of the gaze trajectory).Results: The indices proposed reflect differences in the behavior of eye movements between the two groups. Nystagmus patients present higher values of IndS - indicating smaller number of slow movements (16% of movements with speeds