Term	Explanation
Anti‐ Vascular endothelial growth factor (Anti‐VEGF)	The drug that suppress or inhibit the effect of VEGF.
Cryotherapy	Cryotherapy, also called cryoablation is a minimally invasive treatment that uses extreme cold to freeze and destroy diseased tissue. During cryotherapy, liquid nitrogen or argon gas flows into a needle‐like applicator (a cryoprobe) creating intense cold that is placed in contact to diseased tissue.
Diathermy	Using high‐frequency electrical current to produce deep heating of tissue.
Intravitreal anti‐VEGF	Injection of anti‐VEGF into vitreous cavity.
Laser photocoagulation	Using laser light to treat certain disorders at the back of the eye.
New vessels	This term is used to signify the abnormal growth of vessels in the eye in response to a need for more oxygen. On the optic disc ‐ new vessels disc 'NVD', on the retina ‐ new vessels elsewhere 'NVE'. Generally, these new blood vessels do not have the normal integrity of blood vessel and tends to bleed.
Regression	New vessels stop growing or obliterated.
Retinal detachment	The retina has fallen away from its correct position at the back of the eye, which leads to a defect in the field of vision and ultimately loss of vision.
Retinopathy	Disease of the retina, for example, diabetic retinopathy is disease of the retina secondary to diabetes, sickle retinopathy is disease of retina secondary to sickle cell disease.
Vitrectomy	Surgical removal of the vitreous.
Vitreous	Soft gelatinous material that fills the back of the eye and sits behind the lens.
Vitreous haemorrhage	Bleeding into the vitreous cavity.
Vascular endothelial growth factor (VEGF)	A substance produced from retina particularly when the oxygen supply is insufficient. It causes growth of new blood vessels in the retina.