Age

20–any

Sex

ALL

Healthy volunteers

Not accepted

Asian descent
NTG diagnosis: glaucomatous optic neuropathy in patients with IOP measurements consistently lower than 21 mmHg
Mean deviation (MD) of the visual field between 0 to -12dB
No significant central vision loss within 5 degrees within 5th percentile
Age ≥20 years
NTG patients who are medically controlled on 1-3 medications and safe to wash out or IOP is still insufficient from medications and safe to washout
Shaffer grade II or more on 3 of the 4 quadrants
Central corneal thickness (CCT) 450-600µm
All participants are able to provide written informed consent before participation

Angle closure glaucoma or narrow angle status post laser peripheral iridotomy (LPI), or any other open angle glaucoma excluding NTG
History of SLT within last 2 years
History intraocular surgery including refractive surgery, except for history of cataract surgery that has been greater than 1 year
Patients anticipating cataract surgery during the study follow-up period
Unable to have DSLT procedure due to pre-limbal findings
Any presence of relevant ocular diseases including retinal disease with no confirmed cure

DSLT in Normal Tension Glaucoma (NTG) Asian Eyes