J Korean Ophthalmol Soc.  2013 Jan;54(1):97-103. 10.3341/jkos.2013.54.1.97.

Comparison of the Efficacy between Time and Spectral Domain Optical Coherence Tomography for the Identification of Vitreomacular Interface

• You JY
• Kim HC
• Moon JW

• KMID: 2216456
• DOI: http://doi.org/10.3341/jkos.2013.54.1.97

Abstract

PURPOSE
To compare the efficacy of time domain (TD) and spectral domain (SD) optical coherence tomography (OCT) in determining vitreomacular interface (VMI).
METHODS
VMIs were evaluated with TD and SD OCT images crossing the fovea horizontally in 69 eyes (mean age 52.7 +/- 15.4 years) and were classified as follows: (1) no vitreomacular separation (VMS), (2) incomplete VMS, and (3) unknown.
RESULTS
In TD OCT, no VMS was observed in 2 eyes (2.9%), incomplete VMS in 2 eyes (2.9%), and unknown in 65 eyes (94.2%). In SD OCT, no VMS was observed in 31 eyes (45.0%), incomplete VMS in 13 eyes (18.8%), and unknown in 25 eyes (36.2%). In 31 eyes with no VMS on SD OCT, 29 eyes (93.5%) presented unknown on TD OCT (p<0.0001). In 13 eyes with incomplete VMS on SD OCT, 2 eyes (15.4%) showed incomplete VMS and 11 eyes (84.6%) showed unknown on TD OCT (p<0.0001). TD OCT was also non-informative in all 25 eyes with unknown on SD OCT.
CONCLUSIONS
SD OCT allows better visualization of VMI than TD OCT, especially in patients with no VMS.

Keyword

Spectral domain optical coherence tomography; Time domain optical coherence tomography; Vitreomacular interface; Vitreomacular separation

MeSH Terms

Humans
Tomography, Optical Coherence*

Figure

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  Figure 1. No VMS: SD OCT image of macula showing complete attachment of the posterior hyaloid to the retinal surface (arrows).

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  Figure 2. Incomplete VMS: SD OCT images for eccentric VMS (A), and perifoveal VMS (B), and shallow VMS (C).

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  Figure 3. Unknown: not able to determine the status of VMI with SD OCT alone.

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  Figure 4. (A) Weiss ring (arrow head), (B) Continuous mobile sheet of posterior hyaloid membrane (arrow).

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  Figure 5. The distribution of vitreomacular interface status evaluated with TD OCT and SD OCT (p < 0.0001).

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  Figure 6. Comparison of the efficacy of TD OCT and SD OCT in the evaluation of vitreomacular interface. Posterior hyaloid interface was visible in only 2 eyes with TD OCT of 31 eyes for which no VMS was identified on SD OCT (A, A1, A2). In 13 eyes with incomplete VMS on SD OCT, vitreomacular interfaces were visualized in only 2 eyes on TD OCT (B, B1, B2).

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  Figure 7. The subtype rate of incomplete VMS on SD OCT.

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  Figure 8. Multilayered posterior hyaloid membrane (A), Bursa premacularis visible with SD OCT (B).

Reference

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