Experimental equipment: head-mounted eye-tracking goggles and head movement sensor

Coordination of Eye and Head Movements in Central Field Loss

This project investigates the interaction between central field loss (CFL) and vestibular function. Two-thirds of patients with CFL complain of vestibular problems, such as dizziness and instability, leading to a high incidence of potentially fatal accidents and falls. The problem is exacerbated by the patient population’s advanced age, due to the documented decline in vestibular function in senescence. Vestibular deficits in CFL patients are likely due to miscalibrated or non-optimal stabilizing eye movements - many essential oculomotor behaviors are highly reliant on retinal input. Individuals with compromised vestibular responses have difficulties with visual field stability, navigation, and self- and external motion perception. These limitations are particularly true for CFL patients, whose visual acuity is already compromised and for whom the vestibular system becomes the predominant source of motion information. Furthermore, vestibular deficits likely affect patients’ use of head movements to compensate for oculomotor limitations due to eccentric viewing and a patchy visual field. Our research aims to examine how head movements contribute to visually-driven oculomotor function in individual with CFL and understand the effect of CFL of vestibular function, specifically the vestibulo-ocular reflex.

 

Tabs

  • Verghese Lab

    Our laboratory studies the mechanisms of healthy vision and action, as well as the basis of attention and visual adaptation in clinical populations.

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  • Shanidze Lab

    Our laboratory is interested in the mechanisms of eye and head coordination and how those mechanisms are altered when vision is compromised.

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