Case ReportValue of the Heidelberg Retinal Tomograph in Optic Nerve HypoplasiaPang, Yi PhD, OD, FAAO; Frantz, Kelly A. OD, FAAO Author Information Illinois College of Optometry, Chicago, Illinois Received June 19, 2007; accepted January 7, 2008. Optometry and Vision Science: July 2008 - Volume 85 - Issue 7 - p E508-E511 doi: 10.1097/OPX.0b013e31817c92df Buy Metrics Abstract 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+1 OS (left eye). Cover test showed constant right esotropia, measuring 10Δ at distance and 16Δ 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 mm2 OD vs. 2.527 mm2 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. © 2008 American Academy of Optometry
