J Korean Ophthalmol Soc.  2016 Apr;57(4):595-600. 10.3341/jkos.2016.57.4.595.

Evaluation of the Cortical Vitreous Using Swept-Source Optical Coherence Tomography in Normal Eyes

• Park SH
• Lee JW
• Lee MJ
• Lee JH
• Song IS
• Lee BR

• KMID: 2212793
• DOI: http://doi.org/10.3341/jkos.2016.57.4.595

Abstract

PURPOSE
To observe the shape of posterior vitreous spaces using swept-source optical coherence tomography (SS-OCT) in normal eyes.
METHODS
The posterior vitreous of 80 eyes of 80 volunteers without ocular disease was imaged. The DRI OCT-1 Atlantis (Topcon, Oakland, NJ, USA) was used to acquire scans of the posterior vitreous over an 18 × 18-mm2 area using the 12-mm horizontal line scan protocol. The size of the premacularis bursa was measured by the aliper function of the OCT.
RESULTS
A boat-shape bursa was found in most cases. The prevalence of detected bursa fell with further increases in the extent of posterior vitreous detachment. The mean width of the bursa premacularis was 7,679.1 µm and the mean depth was 471.4 µm.
CONCLUSIONS
Deep range imaging optical coherence tomography will provide improvement for in vivo anatomic characterization of the cortical vitreous, and allow better visualization of the dimensions of the bursa premacularis.

Keyword

Posterior vitreous; Swept-source optical coherence tomography

MeSH Terms

Prevalence
Tomography, Optical Coherence*
Vitreous Detachment
Volunteers

Figure

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  Figure 1. Evaluation of cortical vitreous using SS-OCT. An OCT 12-mm horizontal scan through the fovea in the left eye of a 57-year-old man. To improve visualization, the brightness and contrast were increased. The height of the bursa premacularis is defined as the distance between the fovea and the anterior border, and the width is the maximum diameter in the 12-mm horizontal scan through the fovea and the disc. The white dot indicates the septum between the bursa premacularis and Cloquet's canal. SS-OCT = swept-source optical coherence tomography.

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  Figure 2. Swept-source optical coherence tomography of the cortical vitreous. A horizontal scan through the fovea and the optic disc showed a boat-shaped bursa premacularis (*). In front of the optic disc, the Cloquet's canal (**) was connected to the bursa premacularis.

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  Figure 3. Classification of posterior vitreous detachment (PVD). ‘’ indicates the border of posterior vitreous. (A) No PVD. (B) PVD stage 1. (C) PVD stage 2. (D) PVD stage 3.

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  Figure 4. Correlation of variation in width and depth of the bursa premacularis with patient age. There was no correlation between variation in width and patient age (R2 = 0.09; A), and between variation in depth and patient age (R2 = 0.03; B).

Reference

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