scholarly journals Refractive Error and Anterior Segment Parametric Changes in Patients with Posterior Capsular Opacification after Nd: YAG Laser Posterior Capsulotomy

2019 ◽  
Vol 26 (3) ◽  
pp. 166-172
Author(s):  
Mehdi Alizadeh ◽  
Nasrin Jiryaee ◽  
Milad Molaei ◽  
Fatemeh Eslami
Keyword(s):  
Refractive Error ◽  
Anterior Segment ◽  
Posterior Capsular Opacification ◽  
Yag Laser ◽  
Posterior Capsulotomy

scholarly journals FREQUENCY OF ACUTE RISE OF INTRAOCULAR PRESSURE FOLLOWING YAG LASER POSTERIOR CAPSULOTOMY

2018 ◽  
Vol 16 (4) ◽  
pp. 109-112
Author(s):  
Muhammad Adnan Khan ◽  
Muhammad Tariq Khan ◽  
Ashfaq Ur Rehman ◽  
Mohammad Idris ◽  
Muhammad Ayub Khan
Keyword(s):  
Intraocular Pressure ◽  
Cataract Surgery ◽  
Goodness Of Fit ◽  
Yttrium Aluminum Garnet ◽  
Categorical Variables ◽  
Posterior Capsular Opacification ◽  
Cross Sectional ◽  
Yag Laser ◽  
Posterior Capsulotomy ◽  
Department Of Ophthalmology

Background: Posterior capsular opacification (PCO) is the most frequent complication of cataract surgery. The objective of this study was to determine the frequency of acute rise of intraocular pressure (IOP) following Neodymium-Yttrium Aluminum Garnet (Nd:Yag) laser posterior capsulotomy. Materials & Methods: This cross-sectional study was conducted in the Department of Ophthalmology, HMC, Peshawar, Pakistan, from July-December 2016. Sample size was 325 selected by consecutive sampling technique. Inclusion criteria were all patients having significant PCO after uneventful cataract surgery with intra ocular lens implant. Demographic variables were sex, age groups and age in years. Research variable was presence of acute rise of IOP following Yag laser capsulotomy. Pre-laser assessment included slit lamp examination and recording of IOP with Goldmann applanation tonometer by a single ophthalmologist. IOP was measured 3 hours after Nd: Yag laser capsulotomy. Rise in IOP was labeled when IOP was ≥5 mmhg from baseline. Mean ±SD was used to express quantitative variables like age. Categorical variables were analyzed as frequency and percentage. Goodness-of-fit was applied to compare the frequency of acute rise in IOP between sample and population. SPSS-20 was used for data entry and its analysis. Results: Out of 325 patients, 170(52.3%) were men and 155(47.7%) were women. The mean age of the sample was 44.92 ±23.843 years. A total of 107(32.9%) patients were 20-39 years old whereas 218(67.1%) were 40-70 years. IOP was raised in 61 (18.8%) patients while in 264(81.2%) patients it was not raised. The frequency of acute rise in IOP after Yag laser capsulotomy was significantly different in sample compared to population. Conclusion: Men were more than women, especially of old age. The frequency of acute rise in IOP after Yag laser capsulotomy was significantly different in sample compared to population.

scholarly journals Refractive Lens Exchange Combined with Primary Posterior Vitrectorhexis in Highly Myopic Patients

2017 ◽  
Vol 2017 ◽  
pp. 1-4
Author(s):  
Tarek A. Mohamed ◽  
Wael Soliman ◽  
Dalia M. EL Sebaity ◽  
Ahmed M. Fathalla
Keyword(s):  
Posterior Capsular Opacification ◽  
Interventional Study ◽  
Yag Laser ◽  
Refractive Lens Exchange ◽  
Posterior Capsulotomy ◽  
Refractive Lens ◽  
23 Gauge ◽  
One Year ◽  
Capsular Bag

Purpose. To evaluate efficacy and safety of primary vitrectorhexis for posterior capsulotomy in highly myopic patients undergoing refractive lens exchange. Methods. The study is a prospective nonrandomized interventional study. The study comprised 60 eyes of 60 myopic patients. All patients underwent refractive lens exchange (RLE) and foldable IOL implantation combined with primary posterior capsulotomy. We used a 23-gauge vitrectomy probe for the creation of the posterior capsule opening. We followed the patients for one year. Results. During surgery, the IOLs remained well centered in the capsular bag after creation of the capsulotomy. Postoperatively, we did not report any complications related to lens centration or changes in the posterior capsulotomy size. No eye required YAG laser posterior capsulotomy and no cases of retinal detachment (RD) occurred during the follow-up period. Conclusion. Primary posterior vitrectorhexis during RLE is an efficient method in preventing the occurrence of posterior capsular opacification (PCO) and the need for YAG laser posterior capsulotomy with its possible complications.

scholarly journals To evaluate the effects of Nd:YAG laser posterior capsulotomy on best corrected visual acuity (bcva) and intraocular pressure

2017 ◽  
Vol 8 (5) ◽  
pp. 93-97
Author(s):  
Ohm Vrajlal Patel ◽  
Neha Chandrakar ◽  
Piyush Bajaj ◽  
Sonam Mahajan
Keyword(s):  
Visual Acuity ◽  
Intraocular Pressure ◽  
Nd:Yag Laser ◽  
Effective Means ◽  
Anterior Segment ◽  
Applanation Tonometry ◽  
Yag Laser ◽  
Posterior Capsulotomy ◽  
Corrected Visual Acuity ◽  
Best Corrected Visual Acuity

Background: Nd:YAG laser is non-invasive and effective means to deal with the posterior capsule opacification.However safe it may have some inherent complications. Rise of intraocular pressure is frequently encountered and incompletely understood complication of YAG laser capsulotomy and documented with conflicting results.Aims and Objective: To assess the efficacy of Nd: YAG laser capsulotomy in term of visual outcome(Best Corrected Visual Acuity) and also study the changes in IOP after the procedure.Materials and Methods: Study evaluated the changes in IOP and visual acuity after Nd-YAG laser capsulotomy in 100 eyes with significant PCO after uncomplicated cataract surgery with IOL implantation. Complete ocular examination including visual acuity, anterior segment examination with slit lamp, fundus and applanation tonometry were performed pre and post-laser in all cases. Posterior capsulotomy was done with VISULAS YAG III Q-switched Nd: YAG laser machine by ZEISS. IOP was recorded before and then at 1hour, 1 Day, 1 week and 1 month post-laser in order to determine the IOP changes.Results: Pre-laser visual acuity ranged from 1/60 to 6/12. Results showed statistically significant improvement in BCVA with 70% patients had BCVA 6/6, 21% had BCVA 6/9 and 8% having BCVA 6/12 post-laser at 1 month. It was observed that 36% of the patients showed no change in IOP while 64% patients showed elevated IOP. Among these 59% patients show rise in IOP that was ≤5 mm Hg while only 5% of the patients had a rise of more than IOP >5 mm Hg. Most of these patients achieved their baseline IOP within 1 day and only 7 % patient had rise in IOP compared to baseline IOP on day 1. None of the patients show elevated IOP after 1 week.Conclusion: Our study showed that Nd: YAG laser posterior capsulotomy provided excellent results in terms of visual improvement and most of the patients had a rise of <5mm Hg which was transient in nature and routine antiglaucoma medication may not be needed in all the patient undergoing Nd;Yag capsulotomy, however caution should be exercised in glaucomatous, aphakic, high myopic and other high risk patients.Asian Journal of Medical Sciences Vol.8(5) 2017 93-97

The effect of PRK on corneal epithelium thickness and pachmetry in treatment of myopia.

2018 ◽  
Vol 9 (SPL1) ◽  
Author(s):  
Furkaan Majied Hamied ◽  
Deyaa Neama Kadhim ◽  
Sohaib A Mahmood
Keyword(s):  
Refractive Error ◽  
Anterior Segment ◽  
Thickness Change ◽  
Corneal Epithelial ◽  
Epithelial Thickness ◽  
Refractive Outcomes ◽  
Epithelium Thickness ◽  
Profile Changes ◽  
Corneal Epithelial Thickness ◽  
Myopic Astigmatism

In order to facilitate the corneal stromal ablation in photorefractive keratectomy the epithelium is removed so corneal repair associated with changes in epithelium and stroma. To study the corneal epithelial thickness and pachymetry profile changes after photorefractive keratec­tomy (PRK) for myopia. Retrospective analysis of the postoperative corneal epithelial thickness and pachymetry profile changes in 22 eyes of 12 patients treated with PRK for myopia or myopic astigmatism. Corneal and epithelial thickness maps within the central 6 mm were obtained by anterior segment spectral-domain optical coherence tomography (SD-OCT) preop­eratively and at 3 months postoperatively. Correlations between pachymetry,epithelial thickness changes and the amount of correction,were analyzed.Compared to preoperative values,the central 2 mm and the paracentral 2 to 5 mm zone epithelium was 1 ± 2.85 and 1 ± 3.11 μm thicker,respec­tively,at 3 months postoperatively (P <.05). The spheri­cal equivalent (SE) changed from-2.80 ± 2.028 diop­ters (D) preoperatively to -0.40 ± 0.42 D at 3 months postoperatively. Females show greater postoperative epithelial thickening, 2.6 ± 3.77 μm,than males,0.34 ± 1.98 μm. There was a trend toward greater epithelial thickening with a larger amount of programmed SE correction, and thinner preoperative epithelium. No correlation between epithelial thickness change and postoperative change in refraction was detected.Negative correlation between between age, refractive error,with the pre and post-operative pachymetry. In general female pachymetry reading is higher than it in male.The corneal epithelial thickness in­creased after PRK up to 3 months postoperatively. It was affected by the amount of myopia treated, gender, and preoperative epithelial thickness. The refractive outcomes did not affected by the postoperative epithelial thickening. Negative correlation between between age, refractive error, with the pre and post-operative pachymetry. In general female pachymetry reading is higher than it in male.

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