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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Medical Imaging

Background:

  • Optic nerve hypoplasia (ONH) is a congenital condition affecting visual development.
  • Understanding the precise retinal changes in ONH is crucial for patient management.

Purpose of the Study:

  • To investigate and characterize the structural and functional retinal alterations in eyes with ONH.
  • To compare retinal findings in ONH patients with healthy controls.

Main Methods:

  • Spectral-domain optical coherence tomography (SD-OCT) for retinal structure analysis.
  • Full-field electroretinography (FF-ERG) and focal macular ERG (FM-ERG) for retinal function assessment.
  • Analysis of 29 eyes from 18 ONH patients and 21 eyes from 21 control subjects.

Main Results:

  • SD-OCT revealed significant thinning of the ganglion cell complex (GCC) and retinal nerve fiber layer (RNFL) in ONH eyes.
  • Variable foveal abnormalities were observed via SD-OCT.
  • FF-ERG showed reduced photopic negative response amplitudes, while FM-ERG demonstrated reduced amplitudes across all components, with preserved implicit times.

Conclusions:

  • ONH is associated with significant structural damage to retinal ganglion cells (RGCs) and their axons.
  • Functional deficits, particularly in RGCs, are evident in ONH patients.
  • The findings highlight the widespread impact of ONH on retinal integrity and function.