Diagnostic Sonography • B-Scan Eye Pathology Atlas
Vitreous Opacities
A structured ocular ultrasound case collection covering the major sonographic appearances of posterior vitreous detachment, including partial, complete, acute, chronic, symptomatic, Weiss ring, hemorrhage-associated, tractional, retinal tear-associated and complex PVD.
Vitreous Opacities — Sonographic Morphology Index
01
Fine Particulate / Low-Level Vitreous Opacities
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02
Diffuse Vitreous Opacification
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03
Coarse / Dense Vitreous Echoes
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04
Mobile / Suspended Vitreous Debris
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05
Clumped / Aggregated Vitreous Opacities
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06
Layered / Dependent Vitreous Opacities
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07
Membranous / Linear Vitreous Opacities
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08
Organized Vitreous Opacities
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09
Highly Reflective / Calcific-appearing Vitreous Opacities
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10
Chronic / Fibrotic Vitreous Opacities
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11
Mixed / Heterogeneous Vitreous Opacities
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12
Complex Vitreous Opacification with Multiple Components
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Chapter 01 • Case Study
Fine Particulate / Low-Level Vitreous Opacities
01 Clinical History
B-scan demonstrates numerous fine, low-level mobile echoes distributed within the vitreous cavity. The appearance is assessed dynamically to characterize the particulate vitreous opacity and to evaluate the underlying retina.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Echoes | Numerous fine, low-level echogenic particles are scattered throughout the vitreous cavity. |
| Distribution | Opacities may be diffuse, scattered or mildly dependent within the vitreous. |
| Mobility | Fine echoes demonstrate variable movement with dynamic ocular examination. |
| Vitreous clarity | The normal anechoic vitreous appearance is mildly to moderately reduced. |
| Retina | The retinal contour should be assessed separately for associated detachment or focal pathology. |
04 Ultrasound Report
Numerous fine low-level mobile echoes are seen throughout the vitreous cavity.
The echoes demonstrate variable mobility on dynamic examination.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Sonographic features of fine particulate / low-level vitreous opacities.
06 Recommendation
Correlate with ophthalmic examination and clinical findings. Assess the retina and vitreoretinal interface carefully.
07 Learning Points
Recognize fine low-level vitreous echoes.
Confirm mobility dynamically.
Assess the entire vitreous cavity systematically.
Exclude associated retinal pathology.
Chapter 02 • Case Study
Diffuse Vitreous Opacification
01 Clinical History
B-scan demonstrates widespread low-to-medium level echogenic material throughout a substantial portion of the vitreous cavity, producing generalized vitreous opacification.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Echoes | Diffuse low-to-medium level echogenic material fills much of the vitreous cavity. |
| Distribution | Opacities are widespread rather than confined to a single focal region. |
| Mobility | Internal echoes generally demonstrate movement with ocular movement. |
| Vitreous clarity | The normal anechoic vitreous appearance is substantially reduced. |
| Retina | Evaluate separately for retinal detachment, choroidal abnormality or other associated disease. |
04 Ultrasound Report
Diffuse low-to-medium level mobile vitreous echoes are present.
The vitreous cavity demonstrates generalized echogenic opacification.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Diffuse vitreous opacification with mobile internal echoes.
06 Recommendation
Correlate with ophthalmic examination and clinical history. Evaluate the retina and choroid for associated pathology.
07 Learning Points
Assess the extent of vitreous involvement.
Use dynamic scanning to characterize mobility.
Distinguish diffuse vitreous opacification from focal or layered patterns.
Search for associated posterior segment disease.
Chapter 03 • Case Study
Coarse / Dense Vitreous Echoes
01 Clinical History
B-scan demonstrates numerous medium-to-high level coarse vitreous echoes with marked internal debris. Dynamic scanning is used to assess mobility and to evaluate the underlying retina.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Echo intensity | Medium-to-high level coarse echogenic vitreous debris is present. |
| Distribution | Coarse echoes may be diffuse, clustered or unevenly distributed. |
| Mobility | Debris may demonstrate variable but appreciable movement on dynamic examination. |
| Vitreous | Marked vitreous opacification reduces visualization of the posterior segment. |
| Retina | Careful scanning is required to exclude retinal detachment or other associated pathology. |
04 Ultrasound Report
Multiple coarse echogenic vitreous echoes are present.
The echoes demonstrate variable mobility on dynamic examination.
The retinal contour remains separately identifiable without definite detachment on the examined views.
05 Impression
Sonographic Impression
Coarse / dense vitreous echogenic opacification.
06 Recommendation
Ophthalmic correlation is recommended. Carefully assess the retina and optic disc region when visualization permits.
07 Learning Points
Recognize increased vitreous echo density.
Assess mobility and distribution.
Do not confuse dense vitreous debris with retinal detachment.
Use multiple scan planes.
Chapter 04 • Case Study
Mobile / Suspended Vitreous Debris
01 Clinical History
B-scan demonstrates discrete suspended echogenic particles and debris that move freely within the vitreous cavity during dynamic examination. The motion and relationship to the retina are assessed carefully.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Suspended echoes | Multiple echogenic particles are suspended within the vitreous cavity. |
| Mobility | The debris demonstrates conspicuous movement after ocular motion. |
| Distribution | Echoes may be scattered throughout the cavity or concentrated in selected regions. |
| Configuration | Individual particles may remain separate rather than forming a continuous membrane. |
| Retina | The retina should be traced independently from the moving vitreous debris. |
04 Ultrasound Report
Multiple suspended echogenic vitreous particles are identified.
The echoes demonstrate free mobility with dynamic examination.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Mobile / suspended vitreous debris producing vitreous opacification.
06 Recommendation
Correlate with ophthalmic examination and clinical history. Assess the retina and vitreoretinal interface for associated abnormalities.
07 Learning Points
Use dynamic scanning to confirm free vitreous mobility.
Distinguish suspended debris from fixed membranes.
Assess distribution throughout the vitreous cavity.
Trace the retina independently.
Chapter 05 • Case Study
Clumped / Aggregated Vitreous Opacities
01 Clinical History
B-scan demonstrates focal-to-multifocal compact echogenic aggregates within the vitreous cavity, producing a clumped appearance rather than uniformly dispersed particulate echoes.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Clumps | Compact echogenic aggregates are seen within the vitreous cavity. |
| Configuration | The aggregates may appear irregular, rounded or lobulated. |
| Mobility | Clumped material may move as larger aggregates with ocular movement. |
| Background vitreous | Additional fine echoes may coexist around the compact aggregates. |
| Retina | The retinal contour must be separately followed throughout the examination. |
04 Ultrasound Report
Irregular compact echogenic clumps are seen within the vitreous cavity.
The aggregated echoes demonstrate mobility with dynamic examination.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Clumped / aggregated vitreous opacities.
06 Recommendation
Correlate with ophthalmic examination and clinical history. Evaluate for associated vitreous hemorrhage, inflammatory debris or other posterior segment pathology as clinically indicated.
07 Learning Points
Identify compact vitreous aggregates.
Assess their mobility and configuration.
Compare clumped material with fixed vitreoretinal membranes.
Evaluate for mixed vitreous pathology.
Chapter 06 • Case Study
Layered / Dependent Vitreous Opacities
01 Clinical History
B-scan demonstrates echogenic vitreous material accumulating dependently, producing a layering appearance. Dynamic scanning and positional change help assess movement and separation of the dependent material.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Layering | Echogenic material forms a dependent layer within the vitreous cavity. |
| Interface | A relatively distinct interface may be visible between clearer and more echogenic vitreous. |
| Mobility | The dependent material may shift with changes in eye position or ocular movement. |
| Density | Echo density can range from fine particulate to more organized debris. |
| Retina | The retinal contour should be traced separately from the dependent vitreous material. |
04 Ultrasound Report
Dependent echogenic vitreous material demonstrates a layered configuration.
The material shows movement/reorganization on dynamic examination.
The retina is separately visualized without definite detachment on the examined views.
05 Impression
Sonographic Impression
Layered / dependent vitreous opacities.
06 Recommendation
Correlate with clinical and ophthalmic findings. Assess the posterior segment for associated vitreous, retinal or hemorrhagic pathology.
07 Learning Points
Recognize dependent vitreous layering.
Use dynamic examination and positional change when appropriate.
Distinguish vitreous layering from retinal detachment.
Assess the underlying retina.
Chapter 07 • Case Study
Membranous / Linear Vitreous Opacities
01 Clinical History
B-scan demonstrates linear, strand-like or membrane-forming echogenic vitreous opacities. Dynamic examination is used to determine mobility and relationship to the retinal surface.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Linear echoes | Thin-to-moderately echogenic vitreous strands or linear opacities are present. |
| Configuration | Opacities may form interconnected strands, arcs or sheet-like structures. |
| Mobility | Vitreous strands may show variable mobility with ocular movement. |
| Retinal relationship | The vitreous membrane should be distinguished from the retinal surface. |
| Associated findings | Assess for traction, hemorrhage, detachment or other posterior segment abnormalities. |
04 Ultrasound Report
Multiple echogenic vitreous strands / membrane-like echoes are seen.
The linear opacities demonstrate variable mobility on dynamic examination.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Membranous / linear vitreous opacities.
06 Recommendation
Ophthalmic correlation is recommended. Carefully evaluate the vitreoretinal interface and retina for associated pathology.
07 Learning Points
Recognize linear and membrane-forming vitreous opacities.
Assess membrane mobility and configuration.
Distinguish vitreous membranes from retinal detachment.
Look for tractional or associated posterior segment findings.
Chapter 08 • Case Study
Organized Vitreous Opacities
01 Clinical History
B-scan demonstrates partially organized echogenic vitreous material forming strands, clusters or irregular internal structures. Dynamic examination helps determine the degree of organization and mobility.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Organization | Vitreous echoes form interconnected strands, clusters or irregular organized structures. |
| Echo density | The organized material may range from moderate to high echogenicity. |
| Mobility | Mobility is variable and may be less than that of freely suspended particles. |
| Configuration | Internal architecture may appear heterogeneous or partially membranous. |
| Retina | Carefully assess the retinal contour and vitreoretinal interface. |
04 Ultrasound Report
Organized echogenic vitreous material is identified with clustered and strand-like components.
The internal structures demonstrate limited/variable mobility on dynamic examination.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Organized vitreous opacities with heterogeneous internal architecture.
06 Recommendation
Correlate with ophthalmic examination and prior ocular history. Assess for chronic vitreous change, hemorrhagic organization and vitreoretinal traction.
07 Learning Points
Recognize progression from particulate to organized vitreous opacity.
Assess internal architecture and mobility.
Distinguish organized vitreous material from fixed retinal membranes.
Evaluate the vitreoretinal interface.
Chapter 09 • Case Study
Highly Reflective / Calcific-appearing Vitreous Opacities
01 Clinical History
B-scan demonstrates multiple highly reflective vitreous echoes with prominent acoustic reflectivity. Dynamic examination assesses whether the reflective foci are suspended, aggregated or relatively fixed.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Reflectivity | Multiple bright, high-amplitude vitreous echoes are present. |
| Configuration | Reflective foci may be punctate, clustered or plaque-like. |
| Mobility | Mobility varies according to the nature and organization of the opacity. |
| Acoustic behavior | Highly reflective foci may produce prominent posterior acoustic effects. |
| Retina | The retina should be separately evaluated for associated calcific or structural pathology. |
04 Ultrasound Report
Multiple highly reflective echogenic foci are present within the vitreous cavity.
The reflective foci demonstrate variable mobility on dynamic examination.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Highly reflective / calcific-appearing vitreous opacities.
06 Recommendation
Correlate with ophthalmic examination and prior ocular history. Further characterization should be based on the clinical context and ocular findings.
07 Learning Points
Recognize unusually high vitreous reflectivity.
Assess whether bright foci are mobile or fixed.
Consider acoustic shadowing or other reflective behavior.
Correlate sonographic appearance with ocular examination.
Chapter 10 • Case Study
Chronic / Fibrotic Vitreous Opacities
01 Clinical History
B-scan demonstrates persistent echogenic vitreous strands, bands or plaques with reduced mobility, suggesting a chronic or fibrotic pattern of vitreous opacification.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Fibrotic echoes | Persistent moderately to highly echogenic strands, bands or plaques are present. |
| Organization | The opacity demonstrates a more established or organized architecture. |
| Mobility | Mobility is reduced compared with freely suspended vitreous debris. |
| Configuration | Linear, band-like or sheet-like structures may be present. |
| Retina | Carefully assess for traction, retinal detachment or other chronic posterior segment changes. |
04 Ultrasound Report
Persistent organized echogenic vitreous strands/bands are identified.
The opacities demonstrate limited mobility on dynamic examination.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Chronic / fibrotic vitreous opacification with organized internal echoes.
06 Recommendation
Correlate with prior ocular history and ophthalmic examination. Evaluate the vitreoretinal interface and retina for tractional or chronic associated changes.
07 Learning Points
Recognize reduced mobility in chronic vitreous opacities.
Identify fibrotic or organized architecture.
Assess the vitreoretinal interface carefully.
Look for tractional and retinal complications.
Chapter 11 • Case Study
Mixed / Heterogeneous Vitreous Opacities
01 Clinical History
B-scan demonstrates a heterogeneous combination of fine particulate echoes, coarse debris and more organized internal opacities within the vitreous cavity. Dynamic scanning is used to characterize each component.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Echo pattern | Fine, intermediate and coarse echogenic components coexist within the vitreous. |
| Heterogeneity | The vitreous demonstrates non-uniform internal echogenicity. |
| Mobility | Different components may show different degrees of mobility. |
| Organization | Some regions may be particulate while others appear clumped or strand-like. |
| Retina | The retinal contour should be evaluated separately throughout the examination. |
04 Ultrasound Report
Heterogeneous vitreous opacification with fine, coarse and organized echogenic components is present.
The internal components demonstrate variable mobility on dynamic examination.
No definite retinal detachment is identified on the examined views.
05 Impression
Sonographic Impression
Mixed / heterogeneous vitreous opacities with variable internal organization.
06 Recommendation
Correlate with clinical history and ophthalmic examination. Evaluate for associated hemorrhagic, inflammatory, degenerative or tractional vitreous pathology as clinically indicated.
07 Learning Points
Recognize mixed vitreous echo patterns.
Characterize each component by density and mobility.
Avoid assigning a single morphology to a heterogeneous vitreous cavity.
Assess the retina and vitreoretinal interface systematically.
Chapter 12 • Case Study
Complex Vitreous Opacification with Multiple Components
01 Clinical History
B-scan demonstrates complex vitreous opacification containing multiple components, including particulate echoes, clumped debris, linear/membranous elements and areas of dense echogenic material. Dynamic scanning is essential for complete characterization.
02 Ultrasound Image
03 Ultrasound Morphology
| Feature | Sonographic Description |
|---|---|
| Multiple components | Fine particulate, coarse, clumped and linear/membranous echogenic elements coexist. |
| Distribution | Opacities may involve multiple regions of the vitreous cavity with variable density. |
| Mobility | Different components may demonstrate free, limited or minimal mobility. |
| Organization | Some debris may be organized into strands, sheets or compact aggregates. |
| Retina | The retina must be traced separately to exclude associated detachment or tractional pathology. |
04 Ultrasound Report
Complex vitreous opacification with multiple echogenic components is identified.
The components demonstrate variable mobility and organization on dynamic examination.
The retinal contour is separately assessed without definite detachment on the examined views.
05 Impression
Sonographic Impression
Complex vitreous opacification with multiple sonographic components.
06 Recommendation
Ophthalmic correlation is recommended. Review prior ocular history and carefully assess the retina, choroid and vitreoretinal interface for associated pathology.
07 Learning Points
Approach complex vitreous opacification component by component.
Assess density, distribution, organization and mobility.
Trace the retina separately from vitreous abnormalities.
Use dynamic and multiplanar scanning for complete characterization.
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