Subhyaloid hemorrhage is the accumulation of blood in the subhyaloid or retrohyaloid space i.e. between the ILM and posterior hyaloid causing a localised detachment of the vitreous from the retina.
The hemorrhage is sharply demarcated because the hyaloid is attached in the region surrounding the hemorrhage.
It begins as a circular shape and later becomes crescentic with a straight upper margin due to the effect of gravity giving it a boat shape.
Source of blood: Retinal blood vessel capillaries
Severe vision loss if it occurs in the macular area
1. Proliferative Diabetic Retinopathy
2. Blunt trauma
4. Anemic/ Leukemic retinopathy
6. Valsalva retinopathy
7. Retinal microaneurysm rupture
8. Terson syndrome
9. Wet ARMD
1. ERM formation with VMT
2. Retinal detachment
4. Toxic effects of the long standing hemorrhage due to extended contact with hemoglobin and Iron- photoreceptor toxicity
● Nd yag hyaloidotomy
● Pneumatic retinopexy with or without tissue plasminogen activator
● Pars plana vitrectomy
Image from Rajan Eye Care Hospital
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