Lens Injury Following Iridotomy With a Q-Switched Neodymium-YAG Laser

Welch, David; Apple, David J.; Mendelsohn, Alan D.; Reidy, James J.; Chalkley, Thomas

doi:10.1001/archopht.1986.01050130137038

Cited by 29 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The incidence of iris haemorrhages was larger for 750 compared with 500 μm sized ps iridectomies, owing to the increased probability of hitting an iris vessel with the increased pattern size. Focal lens damage which was noted in one out of 53 patients is also known from ns laser iridotomies 21. A diameter of 500 μm seems optimally suited to achieve iridectomies of a considerable size while avoiding transient pressure spikes and haemorrhages.…”

Section: Discussionmentioning

confidence: 99%

Initial clinical experience with the picosecond Nd:YLF laser for intraocular therapeutic applications

Geerling

Roider

Schmidt-Erfurt

et al. 1998

British Journal of Ophthalmology

View full text Add to dashboard Cite

Aims/background-Compared with nanosecond (ns) pulses of conventional Nd-YAG lasers, picosecond (ps) laser pulses allow intraocular surgery at considerably lower pulse energy. The authors report initial clinical experiences using a Nd:YLF ps laser for the treatment of various indications for photodisruption. Methods-A Nd:YLF laser system (ISL 2001, wavelength 1053 nm) was used to apply pulse series of 100-400 µJ single pulse energy at a repetition rate of 0.12-1.0 kHz. Computer controlled patterns were used to perform iridectomies (n=53), capsulotomies (n=9), synechiolysis (n=3), and pupilloplasties (n=2). Other procedures were vitreoretinal strand incision (n=2) and peripheral retinotomy (n=1). For comparison, 10 capsulotomies and 20 iridotomies were performed with a Nd:YAG ns laser. The ps laser cut of an anterior capsule was assessed by scanning electron microscopy (SEM). Results-Open, well defined iridectomies (mean total energy 4028 mJ, mean diameter 724 µm) were achieved at first attempt in 92% of the cases. In 64% an iris bleeding and in 21% an IOP increase of >10 mm Hg occurred. All capsulotomies were performed successfully (mean energy 690 mJ/mm cutting length) but with a high incidence of intraocular lens damage. The attempted vitreoretinal applications remained unsuccessful as a result of optical aberrations of the eye and contact lens. Although ps laser capsulotomies and iridectomies required much higher total energy than ns procedures, the resulting tissue eVects of the ps pulses were more clearly defined. SEM examination of a ps incision of the anterior lens capsule demonstrated, nevertheless, that the cut was more irregular than the edge of a continuous curvilinear capsulorhexis. Conclusion-Series of ps pulses applied in computer controlled patterns can be used eVectively for laser surgery in the anterior segment and are considerably less disruptive than ns pulses. The ps laser is well suited for laser iridectomies while the ns laser is preferable for posterior capsulotomies. As vitreoretinal applications remained unsuccessful, the range of indications for intraocular photodisruption could not be extended by the ps laser.(Br J Ophthalmol 1998;82:504-509)

show abstract

Section: Discussionmentioning

confidence: 99%

Initial clinical experience with the picosecond Nd:YLF laser for intraocular therapeutic applications

Geerling

Roider

Schmidt-Erfurt

et al. 1998

British Journal of Ophthalmology

View full text Add to dashboard Cite

show abstract

“…This is a relatively safe procedure with low incidence of complications. The various complications reported after LPI include transient rise in intraocular pressure (IOP), inflammation, corneal endothelial cell damage, focal cataract, bleeding of the iris and dysphotopsias 1–4. Descemet’s membrane detachment (DMD) is an uncommon condition that occurs as a complication of an intraocular surgery or after trauma 5.…”

Section: Introductionmentioning

confidence: 99%

Descemet’s membrane detachment after Nd:YAG laser iridotomy in a patient with pseudoexfoliation

Turaga¹,

Kalary²,

Velamala

2022

BMJ Case Rep

View full text Add to dashboard Cite

Laser peripheral iridotomy is a relatively safe and an effective treatment for pupillary block. Descemet’s membrane detachment (DMD) is an uncommon condition that occurs as a complication of intraocular surgery or after trauma. In this article, we report a case of DMD in a 71-year-old man after Neodymium:Yttrium-Aluminum-Garnet laser peripheral iridotomy in an eye with pseudoexfoliation. The shock waves formed during photodisruption may produce linear cracks at the level of Descemet’s membrane; resulting in detachment. Hence, it is important to be aware of this rare complication especially in eyes with a shallow anterior chamber and predisposing factors like pseudoexfoliation.

show abstract