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Association between axial length and toric intraocular lens rotation according to an online toric back-calculator

International Journal of Ophthalmology(English edition) 2022年第3期15卷 420-425页

作者： Jennifer L.Patnaik Malik Y.kahook John P.Berdahl David R.Hardten Brandie D.Wagner leonard k.seibold Brent A.kramer Department of Ophthalmology University of Colorado School of MedicineAuroraColorado 80045USA Vance Thompson Vision Sioux FallsSouth Dakota 57108USA Minnesota Eye Consultants MinneapolisMinnesota 55404USA Department of Biostatistics Colorado School of Public HealthAuroraColorado 80045USA Department of Ophthalmology University of North CarolinaChapel HillNorth Carolina 27517USA

AIM: To assess the relationship between axial length(AL) and intraocular lens(IOL) rotation among eyes receiving a toric IOL and subsequently entered into an online toric back-calculator ***: Retrospective analysis of data collected online via ***, a freely available online toric back-calculator where surgeons enter pre-and postoperative information to help manage residual postoperative *** records were deemed valid with entry of AL and IOL orientation between January 2017 and March *** was determined by a difference of ≥5° between pre-operative intended IOL orientation and actual post-operative IOL *** and magnitude of rotation are presented with means and associated standard deviation(SD).Linear regression models of this association are ***: Records of 6752 eyes were included in the analysis, of which 74.8% were determined to have a rotated *** magnitude of rotation increased with each millimeter(mm) increase in AL with a mean rotation of 13.3°(SD: 12.8°) for eyes with AL 20-20.9 mm and a maximum mean rotation of 30.6°(SD: 30.3°) among eyes with AL 29-29.9 *** linear modeling demonstrated a significant association(Pkely to rotate and to rotate more degrees from the target *** findings from this study are clinically relevant for surgeons implanting toric IOLs.

关键词： cataract surgery toric lens axial length rotation

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Trans-scleral cyclophotocoagulation: a tale of two probes

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International Journal of Ophthalmology(English edition) 2019年第1期12卷 161-164页

作者： Cara E.Capitena Young Malik Y.kahook David A.Ammar leonard k.seibold Department of Ophthalmology University of Colorado School of Medicine

To compare the histological effects of trans-scleral cyclophotocoagulation(TCP) performed with two different probes, the G-probe(IRIDEX Medical Instruments, Mountain View, CA, USA) and the Ciliprobe(katalyst Surgical, Chesterfield, MO, USA). TCP was performed on two human cadaver eyes from the same corpse. The vertical meridian was marked and opposite sides were treated using either the G-probe or Ciliprobe. The first eye was treated with each probe at 2000 ms/2000 mW and the second eye at 3000 ms/1500 mW. Histological examination revealed separation and loss of the non-pigmented ciliary epithelium as well as vacuolization in all sections for both probes and settings. Changes to the non-pigmented ciliary epithelium treated at 3000 ms/1500 mW were similar between the two probes. A slightly more complete separation of the non-pigmented epithelium was noted on the Ciliprobe treated sections as compared to the G-probe treated sections in the eye treated at 2000 ms/2000 mW. Therefore, in human cadaver eyes, both the G-probe and Ciliprobe produced separation, vacuolization, and loss of the non-pigmented ciliary epithelium at two different, clinically utilized settings.

关键词： trans-scleral cyclophotocoagulation G-probe Ciliprobe

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Sustained-release drug delivery systems for the treatment of glaucoma

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International Journal of Ophthalmology(English edition) 2021年第1期14卷 148-159页

作者： Natasha P.kesav Cara E.Capitena Young Monica k.Ertel leonard k.seibold Malik Y.kahook Department of Ophthalmology University Hospitals Cleveland Medical CenterClevelandOH 44106USA Department of Ophthalmology University of Colorado School of MedicineCO 80045USA

Glaucoma,a leading cause of irreversible blindness,affects more than 64 million people worldwide and is expected to grow in number due to the aging global population and enhanced methods of *** topical therapies are often effective when used as prescribed,the drawbacks of current medical management methods include poor patient adherence,local and systemic side effects,and in some cases,limited therapeutic *** ocular drug delivery platforms promise to deliver differentiated drug formulations with targeted delivery leveraging patient-independent *** platforms are in various stages of development with promising pre-clinical and clinical *** Bimatoprost Sustained Release (SR) intracameral implant was approved in the United States in March of 2020,making it the first long-term injectable therapy available for the treatment of *** review aims to provide an update on novel sustained release drug delivery systems that are available today as well as those that might be commercialized in coming years.

关键词： glaucoma drug delivery sustained release

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Efficacy of combined cataract extraction and endoscopic cyclophotocoagulation for the reduction of intraocular pressure and medication burden

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International Journal of Ophthalmology(English edition) 2016年第5期9卷 693-698页

作者： Sammie J.Roberts Matthew Mulvahill Jeffrey R.SooHoo Mina B.Pantcheva Malik Y.kahook leonard k.seibold Department of Ophthalmology University of Colorado School of MedicineAnschutz Medical Campus Department of Biostatistics University of ColoradoAnschutz Medical Campus

AIM： To report on the efficacy of combined endoscopic cyclophotocoagulation（ECP） and phacoemulsification cataract extraction（PCE） with intraocular lens placement for reduction of intraocular pressure（IOP） and medication burden in glaucoma.·METHODS： A retrospective case review of 91 eyes（73patients） with glaucoma and cataract that underwent combined PCE/ECP surgery was performed. Baseline demographic and ocular characteristics were recorded,as well as intraocular pressure, number of glaucoma medications, and visual acuity postoperatively with 12-month follow-up. Treatment failure was defined as less than 20% reduction in IOP from baseline on two consecutive visits（at 1, 3, 6, or 12 mo postoperatively）,IOP ≥21 mm Hg or ≤5 mm Hg on two consecutive visits, or additional glaucoma surgery performed within12 mo after PCE/ECP.·RESULTS： Overall, mean medicated IOP was reduced from 16.65 mm Hg at baseline to 13.38 mm Hg at 12mo（P 0.0001）. Mean number of glaucoma medications was reduced from 1.88 medications at baseline to 1.48 medications at 12mo（P =0.0003）. At 3mo postoperatively,the success rate was 73.6%（95%CI： 63.3, 81.5）, 57.1% at6mo（95% CI： 46.3, 66.6）, and 49.7% at 12mo（95% CI：38.9, 59.6）. Patient demographic characteristics were not associated with treatment success. The only ocular characteristic associated with treatment success was a higher baseline IOP.· CONCLUSION： Combined PCE/ECP surgery is an effective surgical option for the reduction of IOP and medication burden in glaucoma patients. Patients withhigher baseline IOP levels are most likely to benefit from this procedure.

关键词： endoscopic cyclophotocoagulation glaucoma cataract extraction

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Iris manipulation during phacoemulsification:intraoperative and postoperative complications

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International Journal of Ophthalmology(English edition) 2021年第5期14卷 676-683页

作者： Eric R.Williams Jennifer L.Patnaik D.Claire Miller Anne M.Lynch Richard S.Davidson Malik Y.kahook leonard k.seibold Department of Ophthalmology Sue Anschutz-Rodgers Eye CenterUniversity of Colorado School of MedicineAuroraCO 80045USA

AIM:To quantify intraoperative and postoperative complications in complex phacoemulsification cataract extraction(phacoemulsification)with iris manipulation compared to non-complex and complex phacoemulsification without iris ***:All phacoemulsification cases at the University of Colorado between January 1,2014,and June 30,2017 were *** criteria for the primary outcome of intraoperative complications were planned combination surgery and eyes with less than 28 d *** criteria for the secondary outcomes of postoperative complications were unplanned additional surgery,and chronic steroid eye drop use prior to *** including sex,race/ethnicity,surgery length,visual acuity,intraoperative and postoperative complications,and intraocular pressures(IOP)were collected and analyzed utilizing general linear and Logistic regression ***:The medical records of 5772 eyes were reviewed(500 complex without iris manipulation,367 with iris manipulation).The number of any intraoperative complication in the complex with iris manipulation and complex without iris manipulation groups was 15(4.1%)and 26(5.2%),respectively,compared to 41(0.8%)in the non-complex *** inflammation was found in 135(2.8%)non-complex cases,20(4.1%)complex cases without iris manipulation,and 20(5.6%)complex cases with iris *** adjusted odds ratio of postoperative inflammation in phacoemulsification with iris manipulation compared to non-complex was 2.3(95%CI:1.3-4.0,P=0.005).The rate of IOP spikes>10 mm Hg was significantly greater in cases with iris manipulation(P=0.001).CONCLUSION:Complex cases have more intraoperative ***,only complex cases with iris manipulation led to increase rates of postoperative inflammation and IOP spikes>10 mm Hg.

关键词： phacoemulsification iris manipulation inflammation

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Refractive outcomes among glaucoma patients undergoing phacoemulsification cataract extraction with and without kahook Dual Blade goniotomy

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Eye and Vision 2019年第1期6卷 236-241页

作者： Erin G.Sieck Cara E.Capitena Young Rebecca S.Epstein Jeffrey R.SooHoo Mina B.Pantcheva Jennifer L.Patnaik Anne M.Lynch Malik Y.kahook leonard k.seibold Department of Ophthalmology University of Colorado School of Medicine1675 Aurora Court F731AuroraCO 80045USA

Background:Glaucoma patients undergoing phacoemulsification alone have a higher rate of refractive surprise compared to patients without *** risk is further increased with combined filtering ***,there are few and conflicting reports on the effect of combined phacoemulsification and micro-invasive glaucoma surgery(MIGS).Here,we look at refractive outcomes of glaucoma patients undergoing phacoemulsification with and without kahook Dual Blade(kDB)***:Retrospective chart review of 385 glaucomatous eyes of 281 patients,which underwent either phacoemulsification alone(n=309)or phacoemulsification with kDB goniotomy(n=76,phaco-kDB)at the University of *** main outcome was refractive surprise defined as the difference in target and postoperative refraction spherical equivalent greater than±0.5 Diopter(D).Results:Refractive surprise greater than±0.5 D occurred in 26.3%of eyes in the phaco-kDB group and 36.2%in the phacoemulsification group(p=0.11).Refractive surprise greater than±1.0 D occurred in 6.6%for the phacokDB group and 9.7%for the phacoemulsification group(p=0.08).There was no significant difference in risk of refractive surprise when pre-operative IOP,axial length,keratometry or performance of kDB goniotomy were assessed in univariate ***:There was no difference between refractive outcomes of glaucomatous patients undergoing phacoemulsification with or without kDB goniotomy.

关键词： kahook Dual Blade goniotomy refractive surprise glaucoma cataract

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Comparison of intraocular pressure readings with Perkins,Tonopen,iCare 200,and iCare Home to manometry in cadaveric eyes

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International Journal of Ophthalmology(English edition) 2022年第12期15卷 2022-2027页

作者： Monica k Ertel leonard k.seibold Jennifer L Patnaik Malik Y kahook Department of Ophthalmology University of ColoradoUC Health Sue Anschutz-Rodgers Eye CenterAuroraColorado 80045USA

AIM:To compare intraocular pressure(IOP)readings obtained with Perkins tonometry,i Care Home,i Care 200,and Tonopen to IOP readings obtained with the manometer of a perfusion system to assess the accuracy and reproducibility of each method of tonometry at set ***:The IOP of human cadaveric eyes(n=2)was measured using a manometer inserted into the eye through the optic *** measurements were obtained using a Perkins tonometer,i Care Home,i Care 200,and *** measurements were compared to set point IOP measurements of a manometer to determine accuracy and reproducibility of each ***:Mean IOP readings obtained with the Perkins tonometer compared to manometer readings demonstrated a difference of-1.0±5.0 mm Hg(P=0.45),indicating a lower reading on average than manometery although not *** IOP difference between iCare 200 and manometer was 5.3±2.2 mm Hg(Pkins tonometer demonstrated a standard deviation of 5.0 mm Hg while the Tonopen measurements demonstrated a 4.0 mm Hg standard *** comparison,iCare 200 and iCare Home demonstrated 2.2 and 2.4 mm Hg standard deviation,***:Applanation tonometry produces more accurate IOP readings than rebound tonometry or Tonopen,however it demonstrates greater variability than the other forms of *** tonometry is more reproducible but tends to over-estimate IOP.

关键词： intraocular pressure ocular tonometry manometry

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