Argon laser scatter photocoagulation for prevention of neovascularization and vitreous hemorrhage in branch vein occlusion. A randomized clinical trial.
Main finding: Peripheral scatter treatment should be applied after the development of neovascularization rather than before the development of neovascularization.
Purpose: To evaluate if peripheral scatter argon laser photocoagulation can prevent the development of neovascularization and vitreous haemorrhage.
Study type: Randomized controlled trial
Condition: Branch retinal vein occlus
Participants: Branch retinal vein occlusion
n=401
Intervention:
Group 1: peripheral scatter argon laser photocoagulation
Group 2: control
The development of neovascularization and vitreous haemorrhage was significantly less in treated eyes.
Data accumulated from this study suggested that peripheral scatter treatment should be applied after the development of neovascularization rather than before the development of neovascularization.
September, 1984
Clinical trial
Argon laser photocoagulation for macular edema in branch vein occlusion.
Main finding: Laser photocoagulation is recommended for macular oedema secondary to BRVO.
Study type: Randomized controlled trial
Condition: Macular oedema secondary to Branch retinal vein occlusion
Participants: Branch retinal vein occlusion with macular oedema, VA ≤ 20/40
n=139
Intervention:
Group 1: Argon laser photocoagulation
Group 2: Control
There were significantly more patients in the laser group with visual acuity gain (of at least two lines of visual acuity from baseline maintained for two consecutive visits) compared to control.
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