DR. PRASANNA VENKATESH RAMESH

, Dr. SATHYAN PARTHASARATHY, Dr.R. RAMESH

Abstract

The minimum distance between the Bruch’s Membrane Opening (BMO) and the Internal Limiting Membrane (ILM) in the Optic Nerve Head (ONH) is defined as Bruch’s Membrane Opening–Minimum Rim Width (BMO-MRW). Whereas the distance between BMO and ILM in the horizontal plane is Bruch’s Membrane Opening-Horizontal Rim Width (BMO-HRW). In this video theatre, anatomy of the ONH is decoded from a neophyte user’s point of view, as to why BMO-MRW is more important than the traditional BMO-HRW for glaucoma evaluation. The concepts are depicted in a novel dynamic (Clinical vs OCT Vs Histology) screenplay, detailing the following with animations:

1.True ONH margin

2.BMO

3.BMO-MRW

4.BMO-MRW Vs BMO-HRW

5.Alpha, Beta and Gamma Zone

This video also highlights, how with advent of Anatomic Positioning System, scans were able to align relative to the individual’s Fovea-to-BMO-center (FoBMOC) axis at follow-up, to detect change as small as 1 micron in BMO-MRW, thus creating a new world in glaucoma diagnosis.