A. Open-angle glaucoma
  1. Pretrabecular membranes: All of these may progress to angle -closure glaucoma due to contraction of the pretrabecular membranes.    
  a. Neovascular glaucoma      
b. Epithelial downgrowth
c. ICE syndrom
2. Trabecular abnormalities
a. primary open-angle glaucoma
b. Congential glaucoma
c. Pigmentary glaucom
d. Exfoliation syndrome
e. Steroid-induced glaucoma
f. Hyphema
g. Angle contusion or recession
h. Iridocyclitis (uveitis)
i. phacolytic glaucoma
3. Posttrabecular abnormalities
a. Raised episcleral venous pressure
B. Closed-angle glaucoma
1. Pupillary block (iris bombe
a. primary angle-closure glaucoma
b. Seclusio pupillae (posterior synechiae)
c. Intumescent lens
d. Anterior lens dislocation
e. Hyphema
2. Anterior lens displacement
a. Ciliary block glaucoma
b. Central retinal vein occlusion
c. Posterior scleritis
d. Following retinal detachment surgery
3. Angle crowding
a. Plateua iris
b. Intumescent lens
c. Mydriasis for fundal examination
4. Peripheral anterior synechia
a. Chronic angle closure
b. Secondary to flat anterior chemaber
c. Secondary to iris bombe
d. Contraction of pretrabecular membranes