Normal Tension Glaucoma – A Case Report

Purpose:

This case report describes a standardized optometric examination in a 78-year-old female patient.

Material and Methods:

Visual acuity testing, intraocular pressure measurement by non-contact tonometry, pachymetry, chamber angle measurement, optic disc tomography by optical coherence tomography (OCT) measurement, slit lamp examination with 90 dioptry (90D) lens, and visual field measurement by automated standardized perimetry were performed.

Results:

Best corrected visual acuity was 0.8 (logMar 0.1) in the right eye (OD) and 1.0 (logMar 0.0) in the left eye (OS). Intraocular pressure (IOP) measurement showed a mean value from three measurements per eye of OD 18.6 / OS 18.3 mmHg. The vertical cup/disc ratio (CD ratio) was 0.9 in the right eye and 0.8 in the left eye. The nasal and temporal chamber angle was 41° in the right eye and 41° in the left eye. The visual field measurement showed superior defects on both sides as well as an inferior beginning reduction of sensitivity. The patient was referred to an ophthalmologist with the suspected diagnosis of “normal tension glaucoma”, which was confirmed by the ophthalmologist and treatment was initiated.

Conclusion:

This case report describes the importance of using a variety of screening devices/methods in glaucoma screening for early detection.