Which glaucoma procedure may be repeated more than twice?

• A. Glaucoma Filtration Surgery
• B. Selective Laser Trabeculoplasty
• C. Cyclophotocoagulation
• D. Laser Iridotomy

Answer: (B)

The ability to repeat a glaucoma procedure depends on how much tissue is damaged and the long-term safety of retreatment. Selective Laser Trabeculoplasty uses a low-energy laser that targets pigmented cells in the trabecular meshwork while sparing surrounding tissue. This selective approach minimizes scarring and structural change, so the drainage pathway can respond to another laser session if intraocular pressure rises again. Because of this tissue-sparing effect, SLT can be repeated, typically after intervals of months to years, and many clinicians perform multiple rounds (often more than two) if needed.

Other procedures involve more invasive changes to the eye’s drainage system or carry higher risks with repeat treatments. Filtration surgery (creating a filtration bleb) can be revisited, but repeated surgeries are less predictable and carry increasing complication risks. Cyclophotocoagulation can be effective in refractory cases, but each session adds risk of pain, inflammation, and eye damage, so repeated treatment isn’t as routinely favored. Laser iridotomy is usually a one-time fix for pupillary block and isn’t commonly repeated.

So, the procedure best suited to be repeated more than twice is Selective Laser Trabeculoplasty.