Can a Portable Flash Visual Evoked Potential (VEP) Device Identify Chiasmal Decussation Anomalies in Albinism?

Area of Science:

• Ophthalmology
• Neuroscience
• Medical Devices

Background:

• Visual evoked potentials (VEPs) diagnose chiasmal misrouting in albinism but require specialist centers and have long waits.
• The portable RETeval® device is a potential clinical screening tool for ophthalmic conditions.

Purpose of the Study:

• To evaluate the RETeval® device's utility in detecting chiasmal abnormalities associated with albinism.
• To assess the agreement between the RETeval® and standard VEP techniques for albinism diagnosis.

Main Methods:

• Flash VEPs were recorded using the RETeval® and standard ISCEV techniques in 27 patients with suspected albinism and 40 controls.
• Retrospective analysis of interhemispheric difference correlation values from RETeval® data and amplitude/latency from standard VEPs.

Main Results:

• The RETeval® demonstrated a significant difference in interhemispheric difference between albinism patients and controls (p < 0.001).
• A threshold of 0.001865 on the RETeval® correlation value correctly identified chiasmal misrouting in all 27 albinism patients.
• The RETeval® achieved 97% agreement with standard VEP testing for detecting chiasmal abnormalities.

Conclusions:

• The RETeval® shows potential as a clinical diagnostic tool for chiasmal anomalies in albinism.
• This portable device offers significant time and cost savings, potentially accelerating albinism diagnoses.