Long-term results of Erbium YAG-laser-assisted deep sclerectomy

Abstract

Purpose To evaluate the long-term results of Erbium YAG-laser-assisted deep sclerectomy (DS). In this procedure, the delicate dissection of a deep corneoscleral lamella is greatly simplified by using the Erbium YAG-laser. Methods Data of 14 consecutive patients (10 male, four female, age 67.7710.4 years), who underwent surgery from 1999 to 2000 were analysed retrospectively. The procedure was begun as a standard DS. The deep corneoscleral lamella was dissected with a pulsed Erbium YAG-laser (energy: 40-100 mJ, frequency: 5-10 Hz). Schlemm's canal was unroofed and the lamella thinned until aqueous percolated continuously through the membrane. Results The mean follow-up time was 50.476.8 months. The mean preoperative intraocular pressure (IOP) was 37.7710.5 mmHg. The mean postoperative IOP was 16.173.9 mmHg at 1 month, 15.174.3 mmHg at 3 months, 16.474.5 mmHg at 12 months, and 17.678.7 mmHg at 50.5 months. The complete success rates (IOPp21 mmHg þ IOP reduction X20% without glaucoma medication) were 83.3% at 3 months and 50% at 12 and 50.5 months. Rates for qualified success (IOPp21 mmHg þ IOP reduction X20% with glaucoma medication) were 91.7% at 3 months, 92.9% at 12 months, and 78.6% at 50.5 months. The number of glaucoma medications was reduced from 3.0770.92 preoperatively to 1.1471.41 at 50.5 months. A single case of anterior-chamber penetration, requiring iridectomy, was the only intraoperative complication. Conclusions Erbium YAG-laser-assisted DS has the advantage of a greatly simplified dissection, while offering a successful long-term IOP control comparable to conventional DS.

10 W-level gain-switched all-fiber laser at 28 μm

“…High-power CW and pulsed lasers operating near 3 μm have generated considerable interest in recent years due to their proximity to the fundamental absorption of liquid water [1,2]. The high-power emission centered on the peak absorption of water is particularly appealing for biomedical applications [3], particularly in orthopedics [4], dentistry [5], dermatology [6], and ophthalmology [7]. Powerful and bright fiber lasers operating in the vicinity of 3 μm can also be used as a pump to generate efficient supercontinuum covering the 3-5 μm atmosphere transmission window [8], where various ro-vibrational absorption lines of gas pollutants are resonant [9].…”

Enabling low amounts of YAG:Ce3+to convert blue into white light with plasmonic Au nanoparticles

“…The rare-earth doped phosphor crystal YAG (yttrium aluminium garnet) has been widely investigated in the fields of solid-state lighting, lasers, scintillators and refractive coatings, owing to its attractive optical properties, non-toxicity, and its chemical and thermal stability. [1][2][3][4][5] In particular, cerium doped YAG phosphor (YAG:Ce 3+ ), which emits yellow light with a fairly broad spectral power distribution, has become the most commonly used phosphor in commercial white light emitting diodes (WLEDs) for solid-state lighting because of their many advantages, including their long lifetime, easy fabrication, and because they are environmentally friendly and low cost. [6][7][8][9][10] By incorporating YAG:Ce 3+ phosphor into the body of a blue light 460 nm InGaN LED, some of the blue light will be converted into yellow light by the phosphor.…”

30 W fluoride glass all-fiber laser at 294 μm

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