Chorioretinal anastomoses after argon laser photocoagulation

Area of Science:

• Ophthalmology
• Vascular Biology
• Medical Imaging

Background:

• Proliferative diabetic retinopathy and Leber's disease involve abnormal retinal vasculature.
• Argon laser photocoagulation is a treatment to eliminate abnormal retinal vessels.

Observation:

• Communication between retinal and choroidal circulation was observed post-treatment in two specific cases.
• Rapid-sequence fluorescein angiography confirmed the choroidal origin of these newly formed anastomoses.

Findings:

• Anastomoses developed where dense laser beams likely damaged Bruch's membrane.
• This damage allowed fibrovascular growth from the choroid into the retina.

Implications:

• Excessive laser power density is a risk factor for inducing choroidal-retinal anastomoses.
• This finding highlights a potential complication of argon laser photocoagulation.
• Understanding this complication is crucial for optimizing laser treatment parameters.