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. 2018 Sep 11;42(6):343-348.
doi: 10.1080/01658107.2018.1438477. eCollection 2018 Dec.

Compressive Lesions of the Optic Chiasm: Subjective Symptoms and Visual Field Diagnostic Criteria

Mikiko Takahashi  1 , Toshiaki Goseki  1   2 , Hitoshi Ishikawa  2   3 , Goukon Hiroyasu  1   2 , Kazunori Hirasawa  1   4 , Nobuyuki Shoji  1   2
Affiliations

Compressive Lesions of the Optic Chiasm: Subjective Symptoms and Visual Field Diagnostic Criteria

Mikiko Takahashi et al. Neuroophthalmology. .

Abstract

We investigated the diagnostic ability of a new criterion (simple temporal depression) for compressive lesions of the optic chiasm. The subjects were 124 eyes with compressive lesions of the optic chiasm. The controls were 84 eyes. The Humphrey (Carl Zeiss) visual field test was used for visual field testing. The simple temporal depression index was calculated as the ratio of the sums of the thresholds for one line on the nasal side and temporal side of the vertical meridian. The result of new index was 87% sensitivity and 99% specificity. This result suggested that our new criterion will assist the diagnosis in the future.

Keywords: Optic chiasm; pituitary adenoma; simple temporal depression index; temporal depression index; vertical step.

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Figures

Figure 1.
Figure 1.
Formula for calculating the simple temporal depression index. The ratio (temporal side/nasal side) of the sums of the thresholds for single lines on the nasal and temporal sides of the vertical meridian is calculated separately for the upper and lower quadrants. For example, in this patient, the ratio is 125(24 + 26 + 26 + 25 + 24)/136(26 + 29 + 28 + 22 + 33) = 0.9191 for the upper quadrant and 123(29 + 25 + 21 + 25 + 23)/139(32 + 31 + 27 + 24 + 25) = 0.8849 for the lower quadrant, less than the reference values for the simple temporal depression index of ≤0.9436 for the upper quadrant and ≤0.9762 for the lower quadrant. The patient thus meets the diagnostic criterion.
Figure 2.
Figure 2.
Breakdown of patients. This figure shows (a) causative lesions, (b) severity of optic chiasm compression, (c) subjective symptoms, and (d) department in which initial examination was performed. Multiple subjective symptoms may have been present.
Figure 3.
Figure 3.
Breakdown of patients who did not meet Fujimoto’s criteria. This figure shows (a) causative lesions and (b) severity of optic chiasm compression
See this image and copyright information in PMC

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