Richardson's Method- Optic Disc
|
Stages |
Functional status |
Features |
|
Ia |
Glaucoma
suspect- Low Risk |
Fields
normal
Discs:
CD ratio<0.3,
No
asymmetry,
Pink
and uniform neuroretinal rim
|
|
Ib |
Glaucoma
suspect- High Risk
|
Fields
normal
Positive
family history
Pigment
dispersion/ pseudoexfoliation,
Diabetes
Large
physiological cups
|
|
II
|
Glaucoma
damage- Early
|
Discs-
CD rati0>0.3,
Pink
rim with variable rim width
Fields-
incomplete arcuate/nasal step
|
|
III |
Glaucoma
damage- Late |
Discs-
CD ratio >0.6,
Pale
rim with variably narrow rim width
Fields-
complete arcuate
|
|
IV |
Glaucoma
damage- End Stage |
Discs-
End stage cupping Fields-
Temporal island
|
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