Optical coherence tomography shows retinal abnormalities associated with optic nerve disease

Area of Science:

• Ophthalmology
• Neuro-ophthalmology
• Medical Imaging

Background:

• Primary optic neuropathy can involve structural changes in the neurosensory retina, not just the nerve fiber layer.
• Subretinal fluid is observed in conditions like papilledema and non-arteritic ischemic optic neuropathy, potentially reducing visual acuity.
• Macular edema, sometimes mistaken for optic neuritis, can occur with multiple sclerosis treatments.

Purpose of the Study:

• To investigate structural retinal changes in patients with primary optic neuropathy using optical coherence tomography (OCT).
• To document the presence and characteristics of subretinal fluid and microcystic changes in the inner nuclear layer.
• To explore the potential impact of these retinal findings on the diagnosis and management of optic nerve disorders.

Main Methods:

• Spectral domain optical coherence tomography (SD-OCT) imaging of the macula.
• Analysis of neurosensory retina and nerve fiber layer in patients with primary optic neuropathy.
• Review of documented cases of subretinal fluid and macular edema in optic nerve head swelling and related conditions.

Main Results:

• OCT revealed structural changes in the neurosensory retina in addition to the nerve fiber layer in primary optic neuropathy.
• Subretinal fluid was documented in papilledema and non-arteritic ischemic optic neuropathy.
• Microcystic changes in the inner nuclear layer were observed in a subset of patients with optic atrophy.

Conclusions:

• Retinal structural changes, including subretinal fluid and microcysts, are present in various optic nerve disorders.
• The pathophysiology and visual significance of these retinal findings require further investigation.
• These OCT-identified retinal changes may influence the diagnostic and therapeutic approaches to optic nerve diseases.