Looks like your father has developed diabetic macular edema in his eyes. Treatment for this condition is a combination of laser and ocular
injections based on the Severity.
Any invasive procedure has a risk, and based on evidence available the incidence of infection following intraocular injections is pretty low nowadays if all routine precautions are taken.
Since there is no other option, take an informed decision based on your doctor's advise.
Answered2016-03-09 07:08:18
Let others know if this answer was helpful