Intraocular Pressure Elevation Following Nd:YAG Laser Posterior Capsulotomy

Richter, Claudia U.; Arzeno, George; Pappas, Harry R.; Steinert, Roger F.; Puliafito, Carmen A.; Epstein, David L.

doi:10.1016/s0161-6420(85)33991-x

Cited by 79 publications

(21 citation statements)

References 6 publications

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“…In our study we have significant rise in intraocular pressure at 2hrs and 1day in all the three groups and on intergroup comparison also there was In a study done by Claudia U. Richter et al [18] they found that those patients who had undergone more than 200mj of laser energy showed very quick rise in intraocular pressure. In other similar studies done by Jayne Ge et al [19] and Larrañaga-Osuna G et al [20] both showed rise in IOP at one hour along with persistent elevation in some percentage of patients.…”

Section: Discussionsupporting

confidence: 75%

The Effects of Different Techniques and Energy Used in Nd: Yag Laser Posterior Capsulotomy on Intraocular Pressure: A Prospective Study

Fahim¹

2017

Austin J Clin Ophthalmol

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Purpose: To study the relationship between energy used and its effect on IOP in different capsulotomy techniques i.e. cruciate, circular and inverted 'u'. Subjects and Methods:The study was conducted in 154 patients from the out patients department who fulfilled the inclusion criteria and developed posterior capsular opacification following successful cataract surgery. And the patients were randomly divided into three groups. Group I undergoing cruciate technique, group II undergoing circular technique and group III undergoing inverted U technique. Preprocedure intraocular pressure was recorded by using applanation tonometry. Patients undergoing Nd: Yag laser capsulotomy were seen after 2 hours, 1 day, 1week, 1 month and 3 months and IOP was recorded. The outcome was measured in terms of number of shots given in the technique, total energy used and intra ocular pressure changes after the laser. Results:In the light of our present study, we have found that group II which is circular technique group consumes higher no. of laser shots and higher amount of total laser energy which leads to transient rise in intraocular pressure. Correlation was found between the IOP readings obtained and amount of total laser energy used. Conclusions:The techniques cruciate and inverted U appears to be better and safer than the circular technique in terms of amount of energy used and the complications associated with it.

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Section: Discussionsupporting

confidence: 75%

The Effects of Different Techniques and Energy Used in Nd: Yag Laser Posterior Capsulotomy on Intraocular Pressure: A Prospective Study

Fahim¹

2017

Austin J Clin Ophthalmol

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“…This hypothesis is supported by the observation that IOP rises to a greater extent in eyes, with PCL into the sulcus as compared to eyes with PCL into the sac [20]. IOP declines thereafter, and it is commonly be lieved to return to preoperative or even lower levels in al most all patients [14][15][16][17][18][19][20][21]. The results of this study question this view.…”

Section: Discussionmentioning

confidence: 63%

“…The advent of Nd: YAG capsu-lotomy has greatly improved the treatment o f secondary cat aract. The acute rise in IOP, developing in the immediate postoperative period, is a complication which occurs fre quently after Nd:YAG capsulotomy [10][11][12][13][14][15]. IOP rises more often in aphakic eyes than in pseudophakic eyes [15,16], It can be effectively treated by topical or systemic drug ther apy [17 19].…”

Section: Introductionmentioning

confidence: 99%

“…The acute rise in IOP, developing in the immediate postoperative period, is a complication which occurs fre quently after Nd:YAG capsulotomy [10][11][12][13][14][15]. IOP rises more often in aphakic eyes than in pseudophakic eyes [15,16], It can be effectively treated by topical or systemic drug ther apy [17 19]. It has been shown to be transitory, its magni tude seems to be related to the total energy applied [14] and to the position of the intraocular lens [20].…”

Section: Introductionmentioning

confidence: 99%

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Long-Term Elevation of Intraocular Pressure after Neodymium: YAG Laser Posterior Capsulotomy

Jahn¹,

Emke²

1996

Ophthalmologica

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Uncomplicated extracapsular cataract extraction (EC) followed by posteriorchamber lens implantation (PCL) has been shown to cause long-term lowering of intraocular pressure (IOP) in most patients. Since it has been suggested that Neodymium: YAG (Nd:YAG) laser capsulotomy can provoke persistent glaucoma, we examined the hypothesis that Nd: YAG laser capsulotomy may lead to a permanent elevation of IOP. In a case-control study, we compared two groups of 75 normotensive patients, who were unilaterally pseudophakic after phacoemulsification (PE) + PCL. Patients in group 1 had undergone NdYAG capsulotomy at least 2 months prior to this study, while in group 2 the posterior capsule was intact. Both groups were selected at random. Prior to surgery, none of the patients had suffered from glaucoma. Goldmann applanation tonometry was performed in both eyes of each patient and from that the ratio of IOP_pseudophakic/IOP_phakic was calculated. The distribution of this ratio for the two groups was compared using the Wilcoxon signed-rank test. There were 52 female and 23 male patients in group 1 versus 56 female and 19 male patients in group 2. Their mean ages were 75+11 (group 1) and 75 ± 9 years (group 2). The mean interval after PE + PCL was 48 ± 29 months for patients with Nd:YAG capsulotomy and 16 ± 17 months for patients with intact posterior capsule. Since the Nd:YAG capsulotomy, 28 ± 23 months had elapsed on average. The median ratio of IOP_pseudophakic/IOP_phakic was higher in the Nd: YAG capsulotomy group than in the group of patients with an intact posterior capsule (1.00 vs. 0.80; p < 0.0001). There was almost no percentile, for which the distribution curve of group 1 intersected the curve of group 2. The median IOP in pseudophakic eyes was 14 mm Hg in group 1 and 12 mm Hg in group 2 (p < 0.0001). These results are in accordance with the hypothesis that Nd: YAG capsulotomy will raise IOP permanently in most patients. Therefore NdYAG capsulotomy may harbor the risk of glaucomatous optic nerve damage in the long run. Long-term follow-up seems advisable in order to prevent possible glaucoma damage.

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“…The requirement for less energy with less dissipation of capsular material would lead to fewer complications involving retinal detachment and increased IOP [1,6,14,21] and perhaps to less CMO [23]. The risk of IOL dislocation may be significantly less, especially with plate haptic silicone IOLs.…”

Section: Introductionmentioning

confidence: 99%