Retinal Function in Long-Term Type 1 Diabetes without Retinopathy: Insights from Pattern Electroretinogram and...

Area of Science:

• Ophthalmology
• Neurology
• Endocrinology

Background:

• Diabetic retinopathy (DR) is a common complication of type 1 diabetes (T1DM).
• Subclinical changes in retinal function may precede DR development.
• Assessing early neuronal damage is crucial for T1DM management.

Purpose of the Study:

• To investigate alterations in pattern electroretinogram (pERG) and pattern visual evoked potentials (pVEP) in T1DM patients without DR.
• To determine if pERG or pVEP can detect subclinical retinal dysfunction.

Main Methods:

• Prospective study comparing 23 T1DM patients (46 eyes) with 23 healthy controls.
• pERG and pVEP were recorded using standardized equipment and software.
• Analysis focused on wave amplitudes and peak times.

Main Results:

• T1DM patients had significantly reduced pERG P50 and N95 wave amplitudes compared to controls (p=0.018, p=0.035).
• No significant differences were found in pERG peak times between groups.
• pVEP showed no significant changes in amplitude or peak time in T1DM patients.

Conclusions:

• Long-term T1DM without DR exhibits reduced pERG wave amplitudes, suggesting subclinical retinal ganglion cell dysfunction.
• pERG appears more sensitive than pVEP in detecting early retinal changes in T1DM.
• pERG may serve as a valuable biomarker for monitoring retinal health in T1DM.