Pattern and flash electroretinogram following increased intraocular pressure in pigeons

Area of Science:

• Ophthalmology
• Neuroscience
• Animal Models

Background:

• Intraocular pressure (IOP) is a critical factor in ocular health.
• Electroretinography (ERG) and pattern electroretinography (PERG) are vital tools for assessing retinal function.

Purpose of the Study:

• To investigate the effects of elevated IOP on PERG and ERG in pigeons.
• To compare the sensitivity of PERG and ERG to IOP-induced changes.

Main Methods:

• Pigeons were subjected to elevated intraocular pressure.
• PERG and ERG recordings were analyzed for changes in amplitude and time to peak.

Main Results:

• Increased IOP led to decreased amplitude and increased time to peak in both PERG and ERG.
• PERG alterations were observed at lower IOP levels than ERG alterations for amplitude and time to peak.
• PERG and ERG changes were highly correlated.

Conclusions:

• PERG is a more sensitive indicator of early IOP-induced retinal dysfunction in pigeons than ERG.
• These findings highlight the utility of PERG in monitoring ocular health under conditions of elevated IOP.