Mapping simulated visual field defects with movie-viewing pupil perimetry

Area of Science:

• Ophthalmology
• Neuroscience
• Medical Technology

Background:

• Assessing visual field quality is crucial for diagnosing ophthalmic and neurological diseases.
• Standard automated perimetry (SAP) has limitations for young or cognitively impaired individuals due to its demanding requirements.
• Visual field defects (VFDs) require accurate assessment for effective rehabilitation.

Purpose of the Study:

• To investigate the feasibility of a novel, less demanding perimetry method.
• To assess visual sensitivity using pupil responses during movie watching.
• To determine if this method can identify simulated visual field defects.

Main Methods:

• Analysis of existing data from 70 healthy participants watching movies with simulated VFDs (hemianopia, glaucoma types).
• Gaze and pupil size were recorded during movie viewing.
• A published toolbox (Open-DPSM) modeled pupil responses to visual events to indicate visual sensitivity and differentiate VFD conditions.

Main Results:

• The method successfully dissociated conditions with and without simulated VFDs, achieving an AUC of 0.85–0.97.
• Dissociation accuracy improved with more movies, but 10 movies were sufficient for good classification (AUC 0.84–0.96).
• The pupil response-based method demonstrated effectiveness in identifying simulated visual field impairments.

Conclusions:

• Movie-viewing pupil perimetry shows potential as a complementary diagnostic tool for VFDs.
• This method is particularly beneficial for patients who cannot undergo conventional perimetry.
• The findings suggest a promising, accessible approach for visual field assessment.