Table 1 Demographics of study population.

								No		(%)
Number
Patients								40
Eyes								55
Age (years)
Mean (SD)								3.3 (3.6)
Range								0.2–12
<1								21		(38.2)
1–6								22		(40.0)
7–12								12		(21.8)
>12								0
Preoperative intraocular pressure (mm Hg)
⩽21								10		(18.2)
>21								45		(81.8)
Diagnosis*
Primary congenital glaucoma								35		(63.6 )
Aphakia after congenital cataract								7		(12.7)
Uveitic glaucoma								5		(9.1)
Sturge‐Weber syndrome								3		(5.5)
Persistent hyperplastic primary vitreous								2		(3.6)
Aniridia								3		(5.5)
Traumatic glaucoma								1		(1.8)
Previous glaucoma surgery*
Total (on all eyes)								57
Mean (SD)								1.0 (1.0)
Range								0–4
Types previous glaucoma surgery*
None								21		(38.2)
Trabeculotomy								2		(3.6)
Goniotomy
1×								13		(23.6)
2×								8		(14.5)
3×								2		(3.6)
Trabeculectomy
1×								3		(5.5)
2×								3		(5.5)
3×								1		(3.8)
Deep sclerectomy								2		(3.6)
Glaucoma implant								1		(1.8)
Cyclocryocoagulation								1		(1.8)

*More than one diagnosis or type of surgery per patient is possible.