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Review
. 2020 Feb 2;15(1):59-68.
doi: 10.18502/jovr.v15i1.5946. eCollection 2020 Jan-Mar.

Choroidal Thickness in Acute Non-arteritic Anterior Ischemic Optic Neuropathy

Homayoun Nikkhah  1   2 , Mohadeseh Feizi  1   2 , Naser Abedi  2 , Saeed Karimi  1   2 , Mehdi Yaseri  3 , Hamed Esfandiari  4
Affiliations
Review

Choroidal Thickness in Acute Non-arteritic Anterior Ischemic Optic Neuropathy

Homayoun Nikkhah et al. J Ophthalmic Vis Res. .

Abstract

Purpose: To compare the choroidal thickness in eyes with acute non-arteritic anterior ischemic optic neuropathy (NAION) with healthy contralateral eye and normal controls.

Methods: Thirty-eight eyes with NAION, thirty-eight unaffected fellow eyes, and seventy-four eyes from 37 healthy, age- and sex-matched subjects were included in this prospective comparative case-control study. Choroidal thickness was measured by enhanced depth imaging (EDI) of spectral domain optical coherence tomography (SD-OCT). Peripapillary choroidal thickness (PCT) was measured at 1000 and 1500 μ m from Bruch's membrane opening (BMO). Subfoveal choroidal thickness (SFCT) was measured in central subfoveal area, and 500 microns apart in temporal and nasal sides. Choroidal thickness among NAION eyes, uninvolved fellow eyes, and control eyes were compared.

Results: The mean of PCT at 1000 μ m was significantly thicker in NAION and fellow eyes compared to control eyes (169.7 ± 47, 154.4 ± 42.1, and 127.7 ± 49.9 μ m, respectively, P < 0.001 and P = 0.42). The mean PCT at 1500 μ m was also significantly thicker in NAION and fellow eyes compared to control eyes (178.6 ± 52.8, 162.6 ± 46.1, and 135.1 ± 59 μ m, respectively, P = 0.007 and P = 0.048). The mean PCT at 1000 and 1500 μ m was significantly greater in NAION compared to fellow eyes (P = 0.027 and P = 0.035, respectively). The mean of SFCT was significantly thicker in NAION compared to control eyes (P = 0.032); however, there was no significant difference between uninvolved fellow and control eyes (P = 0.248).

Conclusion: Thicker choroidal thickness in acute NAION and uninvolved fellow eyes compared to normal eyes suggests a primary choroidal role in NAION pathophysiology.

Keywords: Non-arteritic Ischemic Optic Neuropathy; Optic Nerve Head; Swept Source Optical Coherence Tomography; Choroidal Thickness.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Delineated SD-OCT from affected eye: Bruch's membrane (dotted red line), anterior sclera (dotted yellow line), BMO, Bruch's membrane opening.
Figure 2
Figure 2
Choroidal thickness at the center of the fovea and 500 μm from the center at temporal and nasal side.
See this image and copyright information in PMC

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