Study finds, Change in the Ophthalmoscopical Optic Disc Size
A Study was conducted to assess prevalence and associated factors of changes in the ophthalmoscopic optic disc size and shape.

The study included all highly myopic eyes and a randomly selected group of non-highly myopic eyes.

--The study included 89 highly myopic eyes and 86 non-highly myopic eyes.

--Reduction in ophthalmoscopic disc size was associated with non-circular gamma zone enlargement and disc-fovea line elongation.

--Disc size reduction was correlated with a disc diameter shortening in direction of the widest gamma zone enlargement.

--The perpendicular disc diameter remained mostly unchanged, resulting in an ovalisation of the ophthalmoscopic disc shape.

--Enlargement of the ophthalmoscopic disc size was associated with circular gamma zone enlargement and high myopia.

Conclusively, myopic axial elongation may cause a Bruch's membrane opening (BMO) shift into the foveal direction, BM overhanging into the nasal intrapapillary compartment, development and enlargement of the gamma zone on the temporal disc side, reduction in the ophthalmoscopically visible disc area, and ovalization of the ophthalmoscopic disc shape. In a second phase, axial elongation-associated BMO expansion may result in an increase in the circular gamma zone, as well as an enlargement of the ophthalmoscopically visible optic disc due to BM retraction at the nasal disc boundary.