Secondary or Non-Rhegmatogenous Retinal Detachment.

It is always secondary to retinal disease or pathology, unlike primary retinal detachment which is caused by trauma or mechanical force.

Mechanism Of Detachment.
1. Retina being pushed away from its bed by accumulation of blood for example as in case of choroidal haemorrhage or exudate as in case of exudative choroditis or retinopathy. Neoplasms or tumors of choroid may also push retina away from its bed.
2. The retina being pulled away from its bed for example as in case of contraction of fibrous tissue bands in the vitreous for example as in plastic cyclitis, proliferative retinopathy or retrolental fibroplasia...
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