Kevin Houston
This study is investigating whether eye exercises for abducens palsy and internuclear ophthalmoplegia increase ocular range of motion in the paretic direction when performed in virtual reality under head-cancelled compared to head-active conditions.
Participants with abducens palsy or internuclear ophthalmoplegia, two common types of ocular cranial nerve palsies, will perform 3 different tasks in virtual reality under head-cancelled and head-active conditions. Head active is the normal state, where gaze can be shifted by moving the head, the eyes, or a combination of the two. Head-cancelled refers to the condition where the scene moves with the head, rendering head movement ineffective to shift gaze. In this condition, the eyes must move in order to shift gaze. The hypothesis is that this requirement for eye movement will result in larger…
OCNP Group Inclusion Criteria: * Presence of OCNP in one eye with 50% range-of-motion limitation or worse * Able to provide informed consent and will be able to fluently read and understand spoken English OCNP Group Exclusion Criteria: * Presence of bilateral OCNP * Range of motion better than 50% * Visual acuity worse than 20/100 in either eye * Greater than 4-line difference in visual acuity between the eyes, * Structural anomalies or sensory sensitivities (e.g. visual motion sensitivity) that would prevent them from wearing or tolerating a VR headset Participants will be excluded if the…
Scene in virtual reality moves with the head while performing visual tasks.
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