Vitreomacular Traction: OCT Exam Guide

Master vitreomacular traction for NBEO and OKAP with OCT clues, IVTS classification, high-yield differentials and treatment principles.

Reviewed for accuracyJuly 27, 20263 min read

Four-panel OCT differential diagram of the vitreomacular interface: vitreomacular adhesion with the posterior hyaloid attached at the fovea and a normal foveal contour, vitreomacular traction with the hyaloid attached and the fovea distorted with intraretinal cysts, epiretinal membrane as a hyperreflective membrane on the inner retinal surface without hyaloid traction, and full-thickness macular hole with a complete retinal defect

Warm-up

What best defines vitreomacular traction?

Lesson

Vitreomacular Traction in 30 Seconds

Vitreomacular traction is symptomatic macular distortion from persistent vitreomacular attachment during an incomplete posterior vitreous detachment. OCT shows persistent vitreomacular attachment with altered foveal anatomy, often with intraretinal cystic changes. For NBEO and OKAP, separate simple vitreomacular adhesion from traction by the presence of structural distortion.

How Vitreomacular Traction Develops

During incomplete posterior vitreous detachment, focal vitreoretinal adhesion remains at the fovea. Persistent anteroposterior and tangential forces distort the macula. This vitreoretinal interface sits at the internal limiting membrane, the retina's innermost layer. A complete PVD has no persistent macular attachment. An epiretinal membrane exerts traction from the retinal surface rather than the posterior hyaloid.

The IVTS OCT Classification

Focal attachment: Less than 1500 microns of vitreous attachment. It is a key IVTS OCT measurement and may have a more favorable course than broad attachment.
Broad attachment: At least 1500 microns of vitreous attachment. Broad adhesion can produce more diffuse macular distortion.
Isolated VMT: Traction occurs without another macular interface disorder. Identify this before assigning a primary diagnosis.
Concurrent VMT: VMT occurs with another macular disease, most commonly epiretinal membrane or macular hole. The associated finding affects prognosis and treatment planning.

4 Facts Exams Always Ask

OCT distinguishes VMT by persistent posterior hyaloid attachment with foveal distortion, often accompanied by intraretinal cystic changes. ERM appears as a hyperreflective preretinal membrane. A macular hole has a full-thickness foveal defect.
Patients classically report decreased central vision, metamorphopsia and micropsia.
VMT can release spontaneously, particularly in selected focal cases. Observe when symptoms and anatomic distortion do not justify intervention.
Management includes observation, pharmacologic vitreolysis with ocriplasmin in carefully selected eyes without significant epiretinal membrane, and pars plana vitrectomy for persistent or visually significant traction.

The Classic Trap

Do not diagnose VMT from metamorphopsia alone. ERM, VMT and macular hole can all reduce central vision and distort lines. Use OCT to identify the traction source and determine whether there is foveal distortion or a true tissue defect. Do not assume every VMT requires immediate treatment.

Clinical Pearl

The exam anchor is simple: persistent vitreomacular attachment without retinal distortion is vitreomacular adhesion. Attachment with distorted foveal architecture is VMT. This distinction determines whether a vitreoretinal interface finding is clinically meaningful. Persistent traction may either release spontaneously or progress to a full-thickness macular hole, making serial OCT follow-up important.

Check yourself

Checkpoint 1

Per the International Vitreomacular Traction Study (IVTS) classification, vitreomacular traction is distinguished from vitreomacular adhesion by which criterion?

Explanation

The IVTS classification defines vitreomacular traction as perifoveal vitreous separation with persistent vitreofoveal attachment associated with anatomic distortion of the fovea (such as intraretinal changes, cystic changes, or elevation), while vitreomacular adhesion shows attachment without associated retinal distortion. This distinction is important for prognosis and consideration of treatments such as ocriplasmin or vitrectomy.

Checkpoint 2

According to the International Vitreomacular Traction Study (IVTS) classification, a small full-thickness macular hole measures:

Clinical case

A 68-year-old patient reports new central blur and metamorphopsia. OCT shows a partially detached posterior hyaloid that remains attached at the fovea. The foveal contour is distorted, but there is no full-thickness tissue defect and no visible preretinal membrane.

What is the most likely diagnosis?

Explanation

The OCT shows persistent posterior hyaloid attachment with foveal distortion, which separates VMT from vitreomacular adhesion. The lack of a preretinal membrane argues against ERM. The absence of a full-thickness foveal defect argues against macular hole.

Case discussion

Sources & Reviewer Info

Reviewed by Vasilis Inglezis: Optometrist and Ocular Oncology Imaging Specialist, Ocular Oncology Center, Athens, Greece. Last updated July 27, 2026.

Diagram created with AI image generation, clinically reviewed for accuracy.

References

American Academy of Ophthalmology. BCSC Section 12: Retina and Vitreous.
Ryan SJ, et al. Ryan's Retina.
American Academy of Ophthalmology EyeWiki. Vitreomacular Traction Syndrome.

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