PCG is a hereditary childhood glaucoma that is not associated with other ocular, systemic congenital anomalies or acquired conditions it accounts for 26–29% of childhood blindness in Egypt.
Glaucoma defined according to CGRN classification as the presence of two of these factors: elevated IOP> 21, optic disc cupping and corneal findings.
PCG commonly presents bilaterally. The classical triad of symptoms is epiphora, photophobia and blepharospasm and the most common presenting sign is Cloudy cornea
Treatment include medical treatment which role is known to be only supportive to decrease the corneal opacity before surgery or as an adjunct to achieve maximum IOP reduction postoperative
Surgical treatment in the mild form of congenital glaucoma is generally successful, no matter which procedure is chosen but in the moderate and severe forms combined trabeculotomy-trabeculectomy with adjunctive mitomycin C results in better IOP control
Flash VEP is used in uncooperative patients and its latencies are more variable than the pattern reversal type. Therefore, it only tests continuity of the visual pathways from the optic nerve to the occipital cortex.