A Simple and Cost-Effective Setup to Analyze Optokinetic Response in Adult Zebrafish

Area of Science:

• Neuroscience
• Zebrafish models
• Visual function assessment

Background:

• The optokinetic response (OKR) is a crucial indicator of visual and neurological health.
• Zebrafish (Danio rerio) are a valuable model organism for studying visual pathways.
• Existing OKR assays can be complex or expensive.

Purpose of the Study:

• To develop and validate a simple, cost-effective optokinetic response (OKR) assay for adult zebrafish.
• To demonstrate the utility of this assay in detecting visual impairments.
• To provide a tool for visual neuroscience research, disease modeling, and drug discovery.

Main Methods:

• Utilized a mobile phone and stereomicroscope to create a custom OKR assay system.
• Compared OKR in control zebrafish with those subjected to light-induced retinal degeneration (LIRD).
• Quantified differences in OKR to validate the assay's sensitivity.

Main Results:

• The custom OKR assay successfully detected significantly impaired responses in zebrafish with LIRD.
• Demonstrated the assay's ability to differentiate between healthy and visually compromised fish.
• The mobile phone-based system proved effective and reproducible.

Conclusions:

• A simple, affordable mobile phone-based OKR assay is effective for adult zebrafish.
• This assay is a valuable tool for assessing visual function and neurological health in zebrafish models.
• The system has broad applications in visual neuroscience, disease modeling, and pharmaceutical research.