Optic disk contractility in morning glory disk anomaly

Area of Science:

• Ophthalmology
• Medical Imaging
• Pediatric Ophthalmology

Background:

• Morning glory disk anomaly is a congenital optic disk dysplasia.
• It presents with a characteristic posterior fundus excavation, glial tuft, and radial retinal vessels.

Observation:

• A 4-year-old girl exhibited esotropia, enophthalmos, and no light perception in her left eye.
• Fundus examination revealed the morning glory disk anomaly.
• Ultrasound B-scan demonstrated increasing axial length in the affected eye during consensual light exposure.

Findings:

• The optic disk showed dynamic contractility, contracting and expanding with light stimulation to the fellow eye.
• Globe elongation was noted posteriorly in the left eye.
• This optic disk contractility with increasing axial length in response to consensual light exposure is a novel finding in pediatric cases.

Implications:

• This case highlights a previously unreported dynamic characteristic of morning glory disk anomaly.
• It suggests potential light-induced changes affecting ocular dimensions in this condition.
• Further research may elucidate the pathophysiology and clinical significance of this optic disk behavior.