DSLT in Normal Tension Glaucoma (NTG) Asian Eyes

N/ANot Yet RecruitingNCT07300852

Ngoc Nguyen Inc.40 enrolled

Overview

The goal of this clinical trial is to evaluate the efficacy of direct selective laser trabeculoplasty (DSLT) or laser treatment in Asian patients with normal tension glaucoma. The main question it aims to answer is: Does the DSLT reduce intraocular pressure (IOP) and medication use in Asian NTG subjects? Participants will attend routine follow-up visits with their eye surgeon and glaucoma testing such as optical coherence tomography (OCT) imaging and visual field test(s) after the laser study treatment.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Normal Tension Glaucoma (NTG)Glaucoma Open Angle Glaucoma (OAG)Glaucoma, Open Angle

Interventions

Direct Selective Laser Trabeculoplasty (DSLT)DEVICE

Direct Selective Laser Trabeculoplasty (DSLT) is a non-contact laser procedure that delivers energy to the trabecular meshwork without the need for a gonioscopy lens. The BELKIN Vision Eagle device automatically aligns and applies laser pulses to lower intraocular pressure in subjects with normal tension glaucoma. All participants receive a single DSLT treatment followed by routine post-procedure evaluations including IOP checks, visual field testing, and OCT imaging.

Eligibility

Sex: ALLMin age: 20 Years

Medical Language ↔ Plain English

Inclusion Criteria: * 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 Exclusion Criteria: * 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

Outcomes

Primary Outcomes

Change in Intraocular Pressure (IOP)

Absolute change in washed-out intraocular pressure (IOP) at 12 months compared to washed-out baseline IOP. Following a 6-week washout at baseline and again at month 11, IOP will be measured using standard tonometry to assess the effect of Direct Selective Laser Trabeculoplasty (DSLT) on pressure reduction.

Time frame: 12 months post procedure

Secondary Outcomes

Number of Glaucoma Medications Reduced

Change in the number of topical glaucoma medications required to control intraocular pressure at 11 months compared to baseline, to evaluate whether DSLT decreases medication burden.

Time frame: 12 months post-procedure

Proportion of Patients Who Are Medication-Free

Proportion of participants who require zero topical glaucoma medications at 11 months after DSLT treatment.

Time frame: 12 months post-procedure

Central Contacts

Ngoc Nguyen, M.D.

CONTACT

4082723706 ngocyu@hotmail.com

Lauren Nguyen