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Published on: March 26, 2020
Value of the Heidelberg Retinal Tomograph in optic nerve hypoplasia
1Illinois College of Optometry, Chicago, IL 60616, USA. ypang@ico.edu <ypang@ico.edu>
Purpose:
A case of optic nerve hypoplasia (ONH) is reported to demonstrate the value of the Heidelberg Retinal Tomograph II (HRT) in assisting with the diagnosis.
Case Report:
An 8-year-old black male was referred to our clinic for evaluation of right esotropia and presumed amblyopia. Best-corrected visual acuities were 20/60 OD (right eye) and 20/25 OS (left eye). Cover test showed constant right esotropia, measuring 10 at distance and 16 at near. A smaller optic nerve head was detected OD with absence of the double ring sign. The findings of HRT were consistent with a diagnosis of unilateral ONH, with a disc area of 1.545 mm OD vs. 2.527 mm OS.
Discussion:
The clinical features, management, and associations of ONH are discussed.
Conclusion:
HRT is a useful tool to assist in diagnosis of ONH by physically measuring the optic nerve.
