Vitreous & Retina

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Retinal Vascular Diseases
Preretinal (Subhyaloid) hemorrhages in a patient with proliferative diabetic retinopathy.

  • Clinical features:
    • Occur either in the level of subhyaloid space between posterior vitreous face and retina or under internal limiting membrane.
    • Localized vitreous gel detachment may occur.
    • Horizontal blood level or boat-shaped hemorrhage is usually apparent, which obscures the underlying retina.
  • Fluorescein angiography demonstrates blockage of underlying details in areas of hemorrhages.
  • Underlying causes include retinal tear, bleeding from neovascularization, rupture of the internal limiting membrane, hypertensive retinopathy, posterior vitreous detachment, and vascular occlusion.

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