What is he suffering from?

Sidharth, born prematurely at 30-weeks (June 6, 2005), weighed less than 1250 grams at birth. He was kept in the incubator for two months for his fragile lungs, heart and digestive system to develop. In October 2005, when he was four months old, an ominous eye condition threatened permanent blindness. Like thousands of other preemies every year, he developed retinopathy of prematurity (ROP), which occurs when blood vessels grow out of control over the retina, causing scarring and retinal detachment. Unfortunately, baby Sidharth’s doctor didn’t detect the condition early on and this has resulted in completed detachment of the retina in his both eyes.

Sidharth is in ROP-stage5. Stage 5 involves a complete detachment of the retina.

Retinopathy of prematurity (ROP) is classified according to the severity of the changes of the blood vessels and the region of the retina into which the vessels have grown. The severity is referred to as the "Stage" and the retinal regions as "Zones".

Stages are as follow:
Immature vessels --> Normal but incomplete growth
Stage 1 --> Mildly abnormal growth
Stage 2 --> Moderately abnormal growth
Stage 3 --> Severely abnormal growth
Stage 4 --> Partially detached retina
Stage 5 --> Completely detached retina