ETIOLOGY AND CLASSIFICATION

Etiology of glaucoma

Obstruction of aqueous humor at

1.  Angle of anterior chamber

2.  Pupil

Pathogenesis

1.  Mechanical factors: intraocular pressure presses on lamina cribrosa

2.  Vascular factors: perfusion of optic nerve head is compromised

CLASSIFICATION OF GLUACOMA

CONGENTAL AND ACQUIRED

AQUIRED FURTHUR DIVIDED INTO PRIMARY AND SECONDARY

PRIMARY GLAUCOMA IS FURTHUR DIVIDED INTO  OPEN ANGLE AND CLOSED ANGLE

Absolute gluacoma: end stage glaucoma with no perception of light and person is blind