Megalopapilla

aka Megalodisc
Congenital anomalous enlarged optic disc area > 2.5 mm²
Not associated with other morphologic anormalities
High prevalence in natives of Marshall Islands
May be unilateral or bilateral
Large optic cup with central pallor given the axons more thinly spread over the disc surface
No treatment needed

Heidelberg OCT measurements

Parameter	Mean	SD	Range
Disc area (mm²)	3.28	0.53	2.50-5.03
Cup area (mm²)	1.65	0.5	0.38-2.85
Rim area (mm²)	1.63	0.37	0.84-2.73
Cup/disc ratio area	0.70	0.86	0.35-0.85

OCT measure	Mean	SD	Range
Average thickness (μm)	102.51	12.68	58.41-120.25
Superior thickness (μm)	130.84	20.18	57.00-169.00
Nasal thickness (μm)	79.67	15.80	49.00-117.00
Inferior thickness (μm)	128.27	18.89	65.00-157.00
Temporal thickness (μm)	70.79	8.46	55.00-92.00