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This abstract is assigned to session AOB Poster session 1 - Glaucoma – Posterior segment/Retinal disease

Title	Selective laser trabeculoplasty in normal tension glaucoma
Abstract Nr.	1019

Purpose	Compare the effect of selective laser trabeculoplasty (SLT) in normal tension glaucoma (NTG) patients with its effect in primary open angle and ocular hypertension patients (POAG/OHT), considering both evolution of intraocular pressure (IOP) and mean number of medication.
Methods	Prospective trial of 130 patients on glaucoma medication. Patients were offered SLT as a means to diminish medication use. Both eyes of the patient underwent SLT. Laser was performed over 360°, 100 spots, 3nsec, 400 μm. IOP and medication were recorded at 1 hour, 1 week, 1, 3, 6, 12 and 18 months. Results were compared with a control group of patients that remained on medication.
Results	IOP changed little after SLT, as the groups were controlled under medication. Nevertheless, SLT was able to achieve additional IOP reduction: 9% and 6% respectively after 12 and 18 months in the NTG group and 19% and 2% respectively in the POAG/OHT group. The use of medication lowered significantly: from a mean of 1.20 in the NTG group to 0.19 and from 1.71 to 0.31 in the POAG/OHT group. This was a significant change compared to the control groups. Mean reduction of medication after SLT was comparable between the NTG and the POAG/OHT group at 1 week, 1 month, 3,6 and 12 months.
Conclusion	The efficacy of SLT is not inferior in NTG patients compared to POAG or OHT patients.
Conflict of interest	No

Authors 1

Last name	DE KEYSER
Initials	M
Department	University of Antwerp
City	Antwerp

Authors 2

Last name	De Belder
Initials	M
Department	University of Ghent
City	Gent

Authors 3

Last name	De Groot
Initials	V
Department	Antwerp University Hospital + University of Antwerp
City	Antwerp