Is Fixation Preference a Potential Indicator of Macular Function in Children?

Area of Science:

• Ophthalmology
• Neuroscience
• Pediatrics

Background:

• Fixation preference testing is crucial for amblyopia detection, especially in young children.
• Pattern electroretinogram (pERG) assesses macular function, an electrophysiological measure.
• Strabismus can impact visual development and binocular vision.

Purpose of the Study:

• To examine the correlation between fixation preference and macular function measured by pERG in children with strabismus.
• To determine if visual acuity differences in strabismic children relate to macular function.

Main Methods:

• 11 children with strabismus underwent ophthalmological examination.
• Tests included fixation preference, best-corrected visual acuity (BCVA), and pERG.
• pERG measured p50 and N95 amplitudes to assess macular function.

Main Results:

• Patients exhibited unilateral fixation and significant differences in BCVA between preferred and non-preferred eyes (p=0.003).
• No significant differences were found in pERG amplitudes (p50 and N95) between eyes (p>0.05).
• BCVA correlated with pERG amplitudes in non-preferred eyes, and interocular BCVA difference correlated with interocular p50 amplitude difference.

Conclusions:

• While BCVA differs between eyes in strabismic children, pERG suggests macular function may be preserved.
• The relationship between fixation preference and macular electrophysiological function warrants further investigation in larger cohorts.
• Amblyopia's underlying mechanisms, potentially involving both cortical and retinal components, require continued study.