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Cryotherapy, also called cryopexy, is a means of freezing the retina where a retinal tear has occurred and or to surgically remove leaking retinal blood vessels. In this process, intense cold is used to induce a retinal scar around the lesion. The scar acts like a glue to heal the lesion in the retina.
The process may be used to treat:
Small retinal detachments
Tumours
Vascular lesions
Different retinopathies
Cryotherapy can be combined with pneumatic retinopexy to treat certain types of retinal detachments. This treatment is helpful in case of a vitreous haemorrhage or when a cataract blocks light from coming in.