Normal Tension Glaucoma
NPG, LTG, LPB, NTG
- Similar to OAG but IOP always < 21 mmHg
- Higher prevalence of vasospastic disorders, blood dyscrasias, autoimmune diseases
- May be related to episodic hypotension, hypothyroidism
- A diagnosis of exclusion!!!
Glaucoma Suspects
OHT
-
Normal visual fields;
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Open, normal-appearing angles
-
Elevated IOP and/or
-
abnormal optic disc/nerve fiber layer
Glaucoma Suspects
OHT
OHTS parameters that influence the risk of developing POAG
- IOP
- Age
- Cup-disk ratio
- Central corneal thickness
Normal central corneal thickness: 500 – 550 µm