Up until several years ago, the only effective treatment for retinal vein occlusions was laser. Intravitreal injections now have a larger
role in the treatment of vein occlusions, but there are still instances when laser is useful.
In central retinal vein occlusions it is still beneficial in patients with significant retinal ischaemia. It these cases it reduces the risk
of developing a severe form of secondary glaucoma called rubeotic glaucoma.
In branch retinal vein occlusions, laser may still be used when there is significant retinal ischaemia, to prevent the growth of abnormal
blood vessels on the retina. It can also be used for macular oedema, if intravitreal injections are not adequately managing the disease.